Hi @Drabek, as a first troubleshooting step, please try to clear your library cache. The widget library cache is located in the file path below, and deleting all of the contents of this folder may help:
Mac (open the Finder and use “Go > Go to Folder” to paste the file path):
If the issue persists, we would like to test whether you can still see other libraries in Axure RP 10. To test this, please create a brand new .rplib file to see if it shows up in your library’s droplist.
We would also like to take a look at your Axure RP log files to see what errors may be picking up. Please send us your “error_log” and “post_log” files from the path below to firstname.lastname@example.org:
Axure RP 10 logs on Mac (open the Finder and use “Go > Go to Folder” to paste the file path):
Axure RP 9 logs on Mac (open the Finder and use “Go > Go to Folder” to paste the file path)
In your email, please also add a link to your post and tell us what steps you have already taken–it will help us to streamline the process.