NetBeans plugin migration
After installing the latest version of NetBeans I found that my old plugins were not migrated. I did the following to migrate them:
Run the new version of NetBeans and tell it to import my old stuff. Then close it again.
Copy the modules directory in ~/.netbeans/
cp -avn ~/.netbeans/<old version>/modules ~/.netbeans/<new version>
Copy additional items from ~/.netbeans/config/Modules
cp -avn ~/.netbeans/<old version>/config/Modules/* ~/.netbeans/<new version>/config/Modules
That did the trick for me though it might not always work depending on the version you are migrating from and to.