Software Center Overload?

[alpha-w]

Hello,
I just bought VCollection 9 and wanted to install it. As already experienced with my last "update round" with VCollection8, FXCollection 2, and Pigments the software center is obviously not able to handle a mass update or installation. It hangs up.
Beside that I get some products only listed, but no button to install or update (Augmented Voices, CS 80V4, MS-20V, Piano V3, Prophet 5 V, Prophet VS V, SQ 80 V, Stage 73 V2, Synclavier V, Synthi V, Vocoder V, Vox Continental V2, Wurli V2).
I tried to close ASC to do single installations (this seems to work, what a mess) and now ASC tells me "Waiting for install to finish before closing". I killed it after 20 min.

Now I am doing installation manually. But how do I get the software listed above:
Augmented Voices, CS 80V4, MS-20V, Piano V3, Prophet 5 V, Prophet VS V, SQ 80 V, Stage 73 V2, Synclavier V, Synthi V, Vocoder V, Vox Continental V2, Wurli V2

[alpha-w]

Update:

I had to trigger each update manually. OP XA V could not be installed. I closed ASC and started again. Suddenly it started an update. 

And now the missing software is listed. I am installing again instrument after instrument manually.