After my Dell 6420 laptop was upgraded from Window 7 to 10 by performing a full re-installation it is impossible to install Dopus. I have tried Dopus 10, 11 and 12 installers (my licence is for Dopus 11).
The error message is
Error Code: -5006 : 0x8000ffff
@Windows 7 / Server 2008 R2 Service Pack 0 (9200)
IE Version: 9.11.14393.0