Your AppData/Dubaicoin must be removed and installed again.
1.Back up and save your keystore form AppData/Dubaicoin
2.Remove AppData/Dubaicoin (delete whole folder)
3.Open bin/gdbix.exe form wallet 2.2 and leave full sync
4.Get back your keystore file in AppData/Dubaicoin which is just created
4.After sync is finished, open dbixwall.exe and your wallet is ready.
Give feedback is everything ok.
Thanks
It seems I had to sync with gdbix.exe first and
only then use dbixwall.exe.
I think this should be improved.
Also, I found that the package
DbixWall-WinGUIv2.2.zip actually contains v2.1.
Thanks.