Seafile Client push MSI update -> Context menu disappears

in our company we pushed the seafile-6.0.0-en.msi on all PCs with a version below 6.0.0
This worked very well, but on all PCs the “right-click” context menu disappeared. Is this a know problem?
We only could workaround this, by uninstalling and reinstalling.

I had the same problem while upgrading to pro version 6.0.6. Can you please check it is not a problem of seafile ?

Ladislas Loughin from the Max Planck Digital Library

This feature is only related to the client. Upgrading the server should not be related.