from what you are describing I don’t think its the addin, but instead a bug in dynamo 2.x -
involving the new libraryUI component - you can try the workaround there in removing the library view extension to at least determine if that is the cause. The dev team is looking at this issue now.
If you get the chance please follow the steps there to remove the library ui and see if the crashes continue.
I would also recommend trying to load packages from a local directory opposed to a network drive.