M&G broke my mailbox *Fixed*

[soo]

Since I installed M&G I haven't had the option to 'pay all bills'. There appears to be a custom mailbox in my game, which I can't delete because it thinks it's being used. I've searched my custom content using both Clean Installer and Delphy's Download organiser and I don't seem to have a custom mailbox in my downloads folder. I had this problem after I install AL which I fixed by deleting the custom mailbox I'd downloaded with a house. But I can't find one this time.

It really is a stupid thing and feel free to mock, but it's bugging me.

ETA: Turns out there was a sneaky custom mailbox that wasn't named as such, it was named as a whole load of random letters and numbers. Thanks for the help.