Ah, yes, the beauty of the GAC and assemblies compiled in Debug. Basically, if an assembly is ever compiled in Debug and then placed in the GAC (which happens often when you're designing), and sometimes when the assembly is in Release mode, the assembly can become "locked" in the GAC, and cannot be overwritten. Try rebooting your computer, and before you open up Visual Studio, go to the My Account are of the website and re-download your license DLL. Then open up "C:\Windows\Assembly" and drag the license file into the folder (you have to re-add the file to the GAC, because after that Access Denied error, it will be gone completely). Then, open the license activation client from the StrataFrame Start menu program group, and activate the license. Le me know if you have any more problems 