Recalbox freezes after update to 6.1.1

[imjbgoode]

Hi! I had recalbox 6.0 installed on my raspberry pi 3 b+ model without any problems. Yesterday I updated to 6.1.1 and now it freezes when switch to some of the systems (master system, mame, linx...) I have been searching, and I haven't seen anything related. Do you know why this could be happening?
I have my raspberry connected to and old crt tv with a x-arcade v1.0 with the xbox 360 adapter.

Thanks a lot in advance.

[Zing]

@imjbgoode It can range from a problem with the theme songs (use the default theme and check), to a corrupted file problem during the update (in the latter case, just doing a fresh, clean installation, from scratch, of the latest official version).