I guess the other altcoins don't have the same need for resync as the don't use the mini blockchain scheme. Cryptonite seems to need a resync if a node hasn't connected for over a week. Looking back at the debug.log file the following error is from when I ran the client the other day:-
'Warning: saved state too old. Fast forward sync may not be possible. Run Resync!!!'
This is when I clicked resync and after that it crashed with the error I posted before.
That is not an error it's only a warning, you might not have to do a resync, if you let it run for a while it may be able to catch up. But if you're way behind and do need to resync then you'll need to start Cryptonited or Qt with the -resync flag. We've always known that clicking on that resync option in Qt will cause a crash, it also happens on Linux systems. Are you experiencing any problems apart from that?
It should work if I do the usual trick of deleting everything bar the wallet.dat including the registry entries to re-install the client. But I'll leave it in the current state in case you need any more logs from it as I don't need to make any transactions now.
I highly doubt your registry has anything to do with it. Deleting everything in your data directory except the wallet.dat should be enough.