Major Problems Since Yesterday - desktop app constantly "loading"

[MikeSkip]

Huge problems since yesterday synching iphone to Windows desktop - just upgraded to 0.9.12.10 and what a HUGE mistake.  None of my playlists are synching and they've all disappeared from my iphone.  I've reinstalled both aps 3 times.  I think the first problem I need to solve is on the Desktop Ap, why is it giving me the constantly loading signal, i.e. the 8 dots rotating?  What is it doing and can this be fixed?

[Peter__]

@MikeSkip - Are you still having issues?

[MikeSkip]

I left the desktop version going overnight and it fixed that problem.
For the ilphone ap, i swtched all playlists to NOT be available offline. Then deleted some itunes files to free up memory. Then on the Spotify ap started making the playlists available offline. That seemed to fix it all.