Hi Colin, I think that I need your help too? I am also having problems with the license of 2DXY SlickMoves in SketchUp 2021. I also contacted Barry Milliken about this and was told to get in touch with SkechUp support becauce he can’t help me with this problem. I am glad that I found this topic about it. Tonight I uninstalled the extension from SketchUp 2019 on my home working mac (after this SketchUp 2019 hanged while quitting making me to force-quit it so I hope the uninstalling proces completed well?), and I will uninstall the extension from SketchUp 2020 on the mac at my office tomorrow but last year I stopped using an old mac (which I clean installed to use it as a second display through target display mode with the replacing new mac at my office) without uninstalling 2DXY SlickMoves from SketchUp 2019 (and maybe even 2018?) from that computer before re-installing the OS because I did’nt know that was needed. I hope you can help me with this?
Edit 20200111 0834: I just uninstalled 2DXY SlickMoves from SketchUp 2020 on my office mac, so now I only have this extension still installed in SketchUp 2020 on my home working mac. However I see (in the extension warehouse in “my downloads”) that there are still 3 activations. This should actually be just one activation according to my current 2DXY SlickMoves extension(s) in use.
I would be very happy if you could help me with this and now that I know how it works with activating licenses I will in the future uninstall the extension from an old version (or before reinstalling a mac ) first before installing the extension in a new version from SketchUp.
Thanks in advance!