Replying to myself.
Author include sources of BazisLibSetup(supportBazisLibSetup) i dont pay any attention from beginning.
Error reproduced if DDK not installed, but WDK installed:
SetupWizardForm.cs
90: if (DDKPath != null)
91: cbDDKPATH.Items.Add(DDKPath);
92: if (WDKPath != null)
93: cbDDKPATH.Items.Add(DDKPath);
To fix error, change line 93 as following
93: cbDDKPATH.Items.Add(WDKPath);
Bazis(sorry, dont know your name), please merge this fix for future.
P.S. Can you setup forum engine to correctly work with Russian symbols, and quotation marks.