A suggestion: redo it a last time... but after having launched your DAW in administrator mode (right-click on the icon then "Run in administrator mode"). You do it only to register your plugin, not each time you launch your DAW.
That kind of issue occurs generally when the DAW (or the plugin) is installed in "Program files" or in "Program files (x86)". The best is to install the software music applications in a dedicated tree made by yourself ("C:\Computer music\" for example). This solution solves definitely all that kinds of flaws due to the limitation on Write operation by Microsoft Windows on its "sensible trees" since Windows 8.