When Script Execution is disabled the install looks successful but you are missing all of the folders under: C:\Program Files (x86)\Quest Software\Notes Migrator For SharePoint 6.3
Also, getting an "Access Denied"/ You do not have permission to perform this action. This message happens when Link Traking is configured and NMSP tries to write the link to a rich text area.
Enable Script Execution and reinstall the product. You may need to perform an uninstall first in some cases.
As an alternative, if you cannot enable script execution you can manually extract the folders by running the following command from the C:\Program Files (x86)\Quest Software\Notes Migrator For SharePoint 6.3 directory:
extract.exe /Y /L . clients.cab * *.*Once this is run manually, the folders should get created and the product should run correctly.