Now...I have to say that years back I had only used Clrmamepro as a tool. I did hear about Romcenter but never tried it. Now I would like to.
Please tell me my decision is correct ..

Questions though I'm not sure about:
I have a complete 0.14x or something romset. Now I downloaded mame64 from official website which is 0.179b. I ran a scan and it seems I am missing almost everything. Something like 99% of the games. It is impossible. Almost all is red. Why ?
In case I have (..) more "mega" folders of roms to add, I can add this/these folders and try to "fix" my destination (actual flder) romset ? Will sw take in account multiple folders as sources for missing roms ?
Also, how do I recognize if my romset is split or merged ? I don't know ATM.
Thanks and I hope to appreciate this software soon. Looks nice ! Ah, staying with stable v3 or should I go with the beta ?
Grazie, ciao !