Virtual Appliance Configuration freezes whole Client. (vRanger 7.6.4) Is there a solution?

Hello Quest, hello Community,

using vRanger 7.6.4 a fews month for now we had noch problems until now.

Last week i recognized i can't edit/configure VAs in the options menu.

Every time i try to open the configuration the complete client freezes.

I tried this solution for vRanger 7.1 but it didn't work:

Does somebody has any idea?

Thanks and regards

Daniel K.