@tig said:

You might have a second Plugins folder unexpectedly set up in ProgramData path as well as your main Users Plugins folder which is always present.
This extra path occurs when you have installed a plugin which has a custom installer and puts its files in there.
Typically these are tools like renderers.
Having extensions install in this secondary path makes it accessible and loaded for all users on that PC, unlike the User folder which only loads for the named user...
Some experienced users also use tools like Fredo's AdditionalPluginsFolder which allow you to have an extra folder set up in their 'load_path' - thus also allowing selected plugins to load from a central repository. rather than the user's default Plugins folder...

There is a known 'glitch' with the SCF AutoInstall when there are more that one folder available in your 'load_path'.
A dialog opens and asks you to choose the destination for the RBZ's installation - initially highlighting the default User file - but on some PCs the button which must be used to confirm the destination is not visible, so the only option is to close the dialog - the equivalent of a 'cancel'.
However, there's an easy one-off solution.
If you grab the bottom edge of that dialog's frame, using the mouse cursor, and pull it downwards, by only a few mm, then the confirmation button becomes visible.
Click it and all is good.
Next time that dialog opens its previous size is recalled from the Registry , so then the confirmation-button is immediately available to click.

Thank you. I'll try this first later & will report back 😄