I installed it on eclipse neon. It worked fine for one day. The next day I opened it after eclipse oxygen. It first showed an alert something along the lines "your workspace was opened with a later version of eclipse. do you still want to proceed?" I hit yes. Eclipse never started after that The error was "SWTException: Invalid thread access"
This issue was reported on ccw github. It was uspposed to be fixed in 0.35.1. Apparently, it is still broken..
The main dev left the project 2 years ago, transferred it to the new org, but no one picked up the development afterwards.