Microstation Connect - Rename personal.upf and personal.ucf

Question

Hi, 
 I just switched from V8i to Connect and would have a few questions, also among to a comment in the following text (hope I can link this here?): https://envisioncad.com/microstation-connect-ucf-and-pcf-files/ - In the Connect Edition, the UPF and the UCF are now bound to the Microstation user and are called personal.upf and personal.ucf by default. I read in the linked text above, that there is still a configuration variable for the UPF file, but it wouldn't work and you shouldn't use it either ..... !? 
 Is that correct? 
 I would like, as in the past, to rename all of my personalized configuration files with my initials. E.g .: XY_UserPref.UPF and XY_UserConf.UCF I also found the variable for the UPF and was able to test it successfully. It seems to work for the UPF. 
 - What about user-related UCF? How would I have to proceed to rename it? Is that even possible? 
 In msconfig.cfg (which we shouldn't touch) I found: # ------------------------------------------------- --------------------- # The names of the user preference (.upf) and user configuration (.ucf) files, # which are stored in the $ (_ USTN_HOMEPREFS) directory, are determined by _USTN_USERNAME. # ------------------------------------------------- -------------------- _USTN_USERNAME: Personal _USTN_PREFNAMEBASE: $ (_ USTN_HOMEPREFS) $ (_ USTN_USERNAME) # ------------------------------------------------- -------------------- 
 That means that the UPF and UCF always get this fixed name "Personal" via this variable .... But I still haven&acute;t understood, how Microstation controll which UCF file has to be loaded, in order to refer to a renamed file. Please, can someone explain this? 
 I would be happy if you could explain what the statement in the text linked above is based on and whether my plan for renaming this files is possible. 
 Thanks a lot Regards Raphael