After the sync, v3alpha5 should work just fine.

Sorry but I am a bit lost. Will I also be able to upload songs, as I do with v3alpha3?

Thank you Mark and all the others who helped here!


Edit:

Ok, ok, I got it. So, one has to go through a resync (=dbase rebuilt) in v3alpha3 before upgrading to v3alpha5 . Sorry, I must have drunk too much spumante...