I cannot help but wonder why Graphisoft did not provide a user control in the dialog for relocating the library, but I found a workaround that saves you from having to reinstall the BS.
Shut down your BS.
Open the file TeamworkServer.config.xml in the folder Applications (or Program Files) > Graphisoft > BIM Server > TeamworkServer > Config
Change the library path as located in the attached screenshot.
Restart your BS.
I tested this by creating the new folder Libraries_test and verifying that when I started the BS, this was the folder used ... and that no libraries were found in that location. I uploaded a library, and it went there.
I then deleted the contents of that folder, and moved all of my old-location library content (being sure to include everything - especially the attachments.db file) into the new folder, and BS and ArchiCAD found everything.
This has not been approved by Graphisoft - but as far as I can tell, it gives you a means of moving your libraries to a different location pretty easily.
Karl
AC 28 USA and earlier • macOS Sequoia 15.3, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
One of the forum moderators