I can't acsses any of the Rex stuff in the gallery and girls menu. This has persisted through all the versions I have downloaded.
Probably a bug from a previous version being carried through the save files. Gonna assume the character is blacked out. Does starting a new game fix it? If so you can adjust a value in the save file.
Win: C:\Users\*user*\AppData\Local\MallCreeps_0_004b
The line:
obj_charRex Lock:="1.000000"
should be:
obj_charRex Lock:="0.000000"
Androids unfortunately hide their files a little better. If it's a non issue then I can just add unlock it in v0.008.