I had the same right-click problem after updating WindowBlinds. Sysmetrix v.3.24 only works for me after uninstalling WB 4.50 release and reinstalling Sysmetrix. I hope someone figures out what the conflict is, but until then I'll use Sysmetrix lay off WB for a time.
Running Win2000 sr4 on a G-force FX3200.