A second beta release of the next version of Clippings for Thunderbird is now available, and is compatible with Thunderbird 68 beta.
Clippings for Thunderbird 5.7 beta 2 is intended for testers and early adopters who want the 
latest and greatest, and are willing to tolerate a few bugs. 
What's New in Clippings 5.7 beta 2:
- Fixed regression issues with the Paste Clipping By Name dialog
- Bug fix: Find Clippings/Folders in Clippings Manager doesn't work (issue #37)
- Bug fix: Missing add-on icon in Add-ons Manager (issue #35)
- Other minor fixes
For more details about Clippings for Thunderbird 5.7, as well as instructions on how to get it, please 
read the blog post
 on the AE Creations blog.  The blog post also provides information on 
where to provide feedback, ask questions or to report a bug.