Saying "google is your friend" is a waste of a comment, why bother writing that. Why couldn't you write something helpful like Igor did, the steps to get to file manager, instead of posting an unnecessary comment?
For the record I've been dealing with custom roms since Cyanogen, but i've not delved much in twrp apart from wiping and installing, nor I do it often enough to remember everything at all times. Better to ask than to "experiment" (like you said) and then screw something up.
@Igor Eisberg , tried deleting the folder like you said, still not working. I ended up installing a different gallery app, I'll eventually backup and do the clean install.