I just unpacked the Bolanza scenery as new and placed it directly in my Addon Linker scenery folder.
I moved the other sceneries / planes, unpacked from the original MSFS Community folder.
There is a problem with that.
I don’t have all the zip files anymore and that’s why I’m terrified of searching all the scenery, airports etc on the internet again and reinstalling. I have a lot of it.
I thought it would be enough to move them from Community to the appropriate MSFS Addons Linker folder.