From the solution response:
To fix both issues:
As the ActiveX installer does not include an uninstaller, the best solution is to rename the WGA DLL via PowerShell or Command Line as Administrator so that Photo Story can no longer find it, and so you can enable it again in the future without issue.
Windows x86:
PS: "Rename-Item $env:windir\System32\LegitCheckControl.DLL LegitCheckControl.Disabled.DLL"
CMD: "rename %windir%\System32\LegitCheckControl.DLL LegitCheckControl.Disabled.DLL"
Windows x64:
PS: "Rename-Item $env:windir\SysWOW64\LegitCheckControl.DLL LegitCheckControl.Disabled.DLL"
CMD: "rename %windir%\SysWOW64\LegitCheckControl.DLL LegitCheckControl.Disabled.DLL"