"Properties are not available" + Uninstalling addon

I have installed Capella version 6.1.0 with the viewpoint 0.13.1. then I migrated to project to version 6.1.0 and it seems to have solved the issue of the Properties. They are working correctly now.

While Properties issue was solved, I now have another problem to solve related to version 6.1.0 which can be read in the link below.