Sorry, I should have started a new thread right away, instead of interferingcrash on clicking User menu - as often as i want too! (same w/ Alt + U).
Testing:
deleted udc.dat, started XY and then saved the blank UDC settings. No problem to get to Manage commands. Closed XY, copied the old udc.dat back to XY home. Accessed User menu successfully by Alt+U. XY seems to read and display it flawlessly. Saved settings. Closed.
Restarted, crash on access of User menu again.
Restarted, went to XY home (with the intention to look for rights inconsistencies). With udc.dat selected clicking on User menu got me a "Runtime error '14' Out of string space." yelling at me. On confirming XY crashes.
(I know there are at least two no longer existing application paths on my UDC OpenWith).
XYplorer Beta Club