diff --git a/Bosses.py b/Bosses.py
index ebf8b4dd..253717bd 100644
--- a/Bosses.py
+++ b/Bosses.py
@@ -1,5 +1,5 @@
 import logging
-import random
+import RaceRandom as random
 
 from BaseClasses import Boss
 from Fill import FillError
diff --git a/DoorShuffle.py b/DoorShuffle.py
index a2d7a9e6..8ad99965 100644
--- a/DoorShuffle.py
+++ b/DoorShuffle.py
@@ -1,4 +1,4 @@
-import random
+import RaceRandom as random
 from collections import defaultdict, deque
 import logging
 import operator as op
@@ -1843,7 +1843,7 @@ def find_accessible_entrances(world, player, builder):
     elif world.mode[player] != 'inverted':
         start_regions = ['Links House', 'Sanctuary']
     else:
-        start_regions = ['Links House', 'Dark Sanctuary Hint']
+        start_regions = ['Links House', 'Dark Sanctuary Hint', 'Hyrule Castle Ledge']
     regs = convert_regions(start_regions, world, player)
     visited_regions = set()
     visited_entrances = []
diff --git a/DungeonGenerator.py b/DungeonGenerator.py
index c8599748..1c49cba0 100644
--- a/DungeonGenerator.py
+++ b/DungeonGenerator.py
@@ -1,4 +1,4 @@
-import random
+import RaceRandom as random
 import collections
 import itertools
 from collections import defaultdict, deque
diff --git a/DungeonRandomizer.py b/DungeonRandomizer.py
index b1c02c81..d24e81d6 100755
--- a/DungeonRandomizer.py
+++ b/DungeonRandomizer.py
@@ -3,7 +3,7 @@ import argparse
 import copy
 import os
 import logging
-import random
+import RaceRandom as random
 import textwrap
 import shlex
 import sys
diff --git a/Dungeons.py b/Dungeons.py
index d5297400..596da920 100644
--- a/Dungeons.py
+++ b/Dungeons.py
@@ -1,4 +1,4 @@
-import random
+import RaceRandom as random
 
 from BaseClasses import Dungeon
 from Bosses import BossFactory
diff --git a/EntranceShuffle.py b/EntranceShuffle.py
index d4449cd8..0cccb347 100644
--- a/EntranceShuffle.py
+++ b/EntranceShuffle.py
@@ -1,4 +1,4 @@
-import random
+import RaceRandom as random
 
 # ToDo: With shuffle_ganon option, prevent gtower from linking to an exit only location through a 2 entrance cave.
 from collections import defaultdict
@@ -493,7 +493,7 @@ def link_entrances(world, player):
         if invFlag:
             # shuffle aga door first. if it's on hc ledge, then one other hc ledge door has to be must_exit
             all_entrances_aga = lw_entrances + dw_entrances
-            aga_doors = [i for i in all_entrances_aga]
+            aga_doors = [i for i in all_entrances_aga if world.shufflelinks[player]]
             random.shuffle(aga_doors)
             aga_door = aga_doors.pop()
             
@@ -687,7 +687,8 @@ def link_entrances(world, player):
 
         if invFlag:
             # shuffle aga door. if it's on hc ledge, then one other hc ledge door has to be must_exit
-            aga_door = random.choice(entrances)
+            aga_choices = [x for x in entrances if world.shufflelinks[player]]
+            aga_door = random.choice(aga_choices)
             
             if aga_door in hc_ledge_entrances:
                 hc_ledge_entrances.remove(aga_door)
diff --git a/Fill.py b/Fill.py
index 5e1176a3..de59a2b5 100644
--- a/Fill.py
+++ b/Fill.py
@@ -1,4 +1,4 @@
-import random
+import RaceRandom as random
 import logging
 
 from BaseClasses import CollectionState
diff --git a/ItemList.py b/ItemList.py
index e37162d6..ac2d5995 100644
--- a/ItemList.py
+++ b/ItemList.py
@@ -1,7 +1,7 @@
 from collections import namedtuple
 import logging
 import math
-import random
+import RaceRandom as random
 
 from BaseClasses import Region, RegionType, Shop, ShopType, Location, CollectionState
 from Bosses import place_bosses
diff --git a/Main.py b/Main.py
index e92bf010..462bd1e5 100644
--- a/Main.py
+++ b/Main.py
@@ -4,7 +4,8 @@ from itertools import zip_longest
 import json
 import logging
 import os
-import random
+import RaceRandom as random
+import string
 import time
 import zlib
 
@@ -28,7 +29,7 @@ from Fill import sell_potions, sell_keys, balance_multiworld_progression, balanc
 from ItemList import generate_itempool, difficulties, fill_prizes, customize_shops
 from Utils import output_path, parse_player_names
 
-__version__ = '0.4.0.11u'
+__version__ = '0.4.0.12u'
 
 
 class EnemizerError(RuntimeError):
@@ -42,8 +43,8 @@ def main(args, seed=None, fish=None):
 
     start = time.perf_counter()
 
-    # if args.securerandom:
-    #     random.use_secure()
+    if args.securerandom:
+        random.use_secure()
 
     # initialize the world
     if args.code:
@@ -62,7 +63,7 @@ def main(args, seed=None, fish=None):
     random.seed(world.seed)
 
     if args.securerandom:
-        world.seed = None
+        world.seed = ''.join(random.choice(string.ascii_uppercase + string.ascii_lowercase + string.digits) for _ in range(9))
 
     world.remote_items = args.remote_items.copy()
     world.mapshuffle = args.mapshuffle.copy()
@@ -341,7 +342,7 @@ def main(args, seed=None, fish=None):
     logger.info(world.fish.translate("cli","cli","made.playthrough") % (YES if (args.calc_playthrough) else NO))
     logger.info(world.fish.translate("cli","cli","made.spoiler") % (YES if (not args.jsonout and args.create_spoiler) else NO))
     logger.info(world.fish.translate("cli","cli","used.enemizer") % (YES if enemized else NO))
-    logger.info(world.fish.translate("cli","cli","seed") + ": %d", world.seed)
+    logger.info(world.fish.translate("cli","cli","seed") + ": %s", world.seed)
     logger.info(world.fish.translate("cli","cli","total.time"), time.perf_counter() - start)
 
 #    print_wiki_doors_by_room(dungeon_regions,world,1)
diff --git a/Mystery.py b/Mystery.py
index 575ab90d..a3b0b509 100644
--- a/Mystery.py
+++ b/Mystery.py
@@ -1,6 +1,6 @@
 import argparse
 import logging
-import random
+import RaceRandom as random
 import urllib.request
 import urllib.parse
 import yaml
diff --git a/Plando.py b/Plando.py
index 254a92b6..2a4b911d 100755
--- a/Plando.py
+++ b/Plando.py
@@ -3,7 +3,7 @@ import argparse
 import hashlib
 import logging
 import os
-import random
+import RaceRandom as random
 import time
 import sys
 
diff --git a/PotShuffle.py b/PotShuffle.py
index e8e6d3ce..d62f52eb 100644
--- a/PotShuffle.py
+++ b/PotShuffle.py
@@ -275,7 +275,7 @@ vanilla_pots = {
 
 
 def shuffle_pots(world, player):
-    import random
+    import RaceRandom as random
 
     new_pot_contents = {}
 
diff --git a/RELEASENOTES.md b/RELEASENOTES.md
index cafdb92f..0ccceb80 100644
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -22,6 +22,11 @@ For accessibility, you now get a C or P indicator to the left of the magic bar o
 
 # Bug Fixes and Notes.
 
+* 0.4.0.12
+	* ER Inverted fix for HC Ledge, and Aga Tower choosing Links House incorrectly
+	* Credits again - hopefully for good
+	* Incorporated music fixes for now (may revisit later)
+	* Secure random re-incorporated
 * 0.4.0.11
 	* Some minor base rom fixes
 	* Improved distribution of bombable/dashable doors
diff --git a/Rom.py b/Rom.py
index ae6b4114..bf4275ea 100644
--- a/Rom.py
+++ b/Rom.py
@@ -5,7 +5,7 @@ import json
 import hashlib
 import logging
 import os
-import random
+import RaceRandom as random
 import struct
 import sys
 import subprocess
@@ -31,7 +31,7 @@ from OverworldShuffle import default_flute_connections, flute_data
 
 
 JAP10HASH = '03a63945398191337e896e5771f77173'
-RANDOMIZERBASEHASH = '487a04cf965bb89636f9b1621dd606d1'
+RANDOMIZERBASEHASH = 'abcc9ca7e5ec6eac56a70e8b248a5883'
 
 
 class JsonRom(object):
@@ -893,17 +893,17 @@ def patch_rom(world, rom, player, team, enemized, is_mystery=False):
 
     write_int16(rom, 0x187010, credits_total)  # dynamic credits
     if credits_total != 216:
-        # collection rate address:
-        cr_address = 0x2391C2
+        # collection rate address (hi):
+        cr_address = 0x238057
         cr_pc = cr_address - 0x120000  # convert to pc
         mid_top, mid_bot = credits_digit((credits_total // 10) % 10)
         last_top, last_bot = credits_digit(credits_total % 10)
         # top half
-        rom.write_byte(cr_pc+0x1c, mid_top)
-        rom.write_byte(cr_pc+0x1d, last_top)
+        rom.write_byte(cr_pc+0x1, mid_top)
+        rom.write_byte(cr_pc+0x2, last_top)
         # bottom half
-        rom.write_byte(cr_pc+0x3a, mid_bot)
-        rom.write_byte(cr_pc+0x3b, last_bot)
+        rom.write_byte(cr_pc+0x1f, mid_bot)
+        rom.write_byte(cr_pc+0x20, last_bot)
 
     # patch medallion requirements
     if world.required_medallions[player][0] == 'Bombos':
@@ -1615,8 +1615,9 @@ def patch_rom(world, rom, player, team, enemized, is_mystery=False):
     # set rom name
     # 21 bytes
     from Main import __version__
+    seedstring = f'{world.seed:09}' if isinstance(world.seed, int) else world.seed
     # todo: change to DR when Enemizer is okay with DR
-    rom.name = bytearray(f'ER{__version__.split("-")[0].replace(".","")[0:3]}_{team+1}_{player}_{world.seed:09}\0', 'utf8')[:21]
+    rom.name = bytearray(f'ER{__version__.split("-")[0].replace(".","")[0:3]}_{team+1}_{player}_{seedstring}\0', 'utf8')[:21]
     rom.name.extend([0] * (21 - len(rom.name)))
     rom.write_bytes(0x7FC0, rom.name)
 
diff --git a/asm/drhooks.asm b/asm/drhooks.asm
index 2824771e..86ae1ff1 100644
--- a/asm/drhooks.asm
+++ b/asm/drhooks.asm
@@ -179,6 +179,17 @@ JSL BlindsAtticHint : NOP #2
 org $1cfd69
 Main_ShowTextMessage:
 
+; Conditionally disable UW music changes in Door Rando
+org $028ADB ; <- Bank02.asm:2088-2095 (LDX.b #$14 : LDA $A0 ...)
+JSL.l Underworld_DoorDown_Entry : CPX #$10
+db $B0, $21 ; BCS $028B04
+BRA + : NOP #6 : +
+
+org $02C3F2 ; <- Bank02.asm:10521 Unused call
+Underworld_DoorDown_Call:
+org $02C3F3
+dw $8AD9 ; address of Bank02.asm:2085
+
 ; These two, if enabled together, have implications for vanilla BK doors in IP/Hera/Mire
 ; IPBJ is common enough to consider not doing this. Mire is not a concern for vanilla - maybe glitched modes
 ; Hera BK door back can be seen with Pot clipping - likely useful for no logic seeds
diff --git a/asm/normal.asm b/asm/normal.asm
index a8ab9597..aabb24de 100644
--- a/asm/normal.asm
+++ b/asm/normal.asm
@@ -398,7 +398,7 @@ StraightStairsTrapDoor:
             .animateTraps
             lda #$05 : sta $11
             inc $0468 : stz $068e : stz $0690
-        ++ rtl
+        ++ JSL Underworld_DoorDown_Call : rtl
     + JML Dungeon_ApproachFixedColor ; what we wrote over
 }
 
diff --git a/asm/owrando.asm b/asm/owrando.asm
index e0d986f5..8cd7bcf1 100644
--- a/asm/owrando.asm
+++ b/asm/owrando.asm
@@ -353,7 +353,7 @@ OWNewDestination:
             ; turn into bunny
             lda $5d : cmp #$17 : beq .return
             lda #$17 : sta $5d
-            lda #$01 : sta $02e0
+            lda #$01 : sta $2e0
             bra .return
         .nobunny
         lda $5d : cmp #$17 : bne .return
diff --git a/data/base2current.bps b/data/base2current.bps
index 044a244c..f66931c0 100644
Binary files a/data/base2current.bps and b/data/base2current.bps differ
diff --git a/resources/app/cli/lang/de.json b/resources/app/cli/lang/de.json
index d2c5d523..6a72d688 100644
--- a/resources/app/cli/lang/de.json
+++ b/resources/app/cli/lang/de.json
@@ -1,6 +1,6 @@
 {
   "cli": {
-    "app.title": "ALttP Tür Randomisier Version %s - Nummer: %d, Code: %s",
+    "app.title": "ALttP Tür Randomisier Version %s - Nummer: %s, Code: %s",
     "shuffling.world": "Welt wird durchmischt.",
     "generating.itempool": "Generier Gegenstandsbasis.",
     "calc.access.rules": "Berechne Zugriffsregeln.",
diff --git a/resources/app/cli/lang/en.json b/resources/app/cli/lang/en.json
index b69287ea..70d7eeda 100644
--- a/resources/app/cli/lang/en.json
+++ b/resources/app/cli/lang/en.json
@@ -2,7 +2,7 @@
   "cli": {
     "yes": "Yes",
     "no": "No",
-    "app.title": "ALttP Door Randomizer Version %s - Seed: %d, Code: %s",
+    "app.title": "ALttP Door Randomizer Version %s - Seed: %s, Code: %s",
     "version": "Version",
     "seed": "Seed",
     "player": "Player",
diff --git a/resources/app/cli/lang/es.json b/resources/app/cli/lang/es.json
index def18849..8bff9dd0 100644
--- a/resources/app/cli/lang/es.json
+++ b/resources/app/cli/lang/es.json
@@ -1,6 +1,6 @@
 {
   "cli": {
-    "app.title": "ALttP Puerta Aleatorizador Versión %s - Número: %d, Código: %s",
+    "app.title": "ALttP Puerta Aleatorizador Versión %s - Número: %s, Código: %s",
     "player": "Jugador",
     "shuffling.world": "Barajando el Mundo",
     "shuffling.dungeons": "Barajando Mazmorras",