"Available offline" content gone after Mac OS Yosemite update.

[CD12]

So I've just finished installing the new Yosemite update and now all my downloaded playlists are no longer available offline.  They still appear in my playlists panel and in their separate folders but anything that was made "Available Offline" has to be redownloaded.

When I check my HD storage stats, it states I have 2.12GB of audio which can only be from Spotify as I don't have any other else, ie itunes or local files.

I would quite simply just download everything again but my internet connection is barely faster than dial-up.

Does anyone have any ideas as to what I can do?

Thanks.

[Peter__]

I'm guessing Spotify have assumed that your mac is a new device since it's operating system has changed, meaning the "new" client can't read the old cache. Unfortunately if this has happened there isn't much you can do other than redownload. It's worth checking out your offline devices section to see if you now have two macs?
https://www.spotify.com/account/offline-devices/

[CD12]

It says I have two devices, one is the mac, the other my phone?

So I'll just have to redownload then?