I have a complete 0.139u1 merged set with the only issue (or non-issue depending on the person) are 155+ version 4 CHD's which clrmamepro shows them mismatched which should be version 5. I used the mame64-0139u1.exe from which I downloaded from
Arcade Database to merge and check a 0.139 set I downloaded from Internet Archive, which i had to find missing CHD's, ROM's and Samples to complete.
If I uncheck "List CHD version mismatches during scan" in Settings>Compressor>CHDMan the set is complete. But is there a way to update the CHD version with CHDMan? Because when I use pS CHDManFE to update them, clrmamepro will see them as unneeded and asks if I would like to remove them, but when I do, then they show up as missing in the scan results.
I also found a batch script over on Arcade Controls forums which is supposed to update the CHD, but after trying it out the version isn't changed at all and CHDMan basically just repacks it.