Hey ,
The crash you are experiencing sounds like it is unrelated to this issue. You might be experiencing a crash, but the callstack being generated could be completely different, as this issue dealt specifically with R9 2 and 3 series cards.
With that in mind, would you mind creating a new AnswerHub post for your issue, which will help not only us track but others who are experiencing the same issue.
If you are experiencing a crash or a major bug, we ask that you take a look at our How to Report Report sticky post on our Forums. It will give you all the correct instructions on how to make an official bug report on the AnswerHub, including the information needed in order to move forward with the reporting/troubleshooting process.
I was also informed that deleting the Source folder will cause some issues for any projects that were created using those source files. Deleting your Binaries, Saved, and Intermediate are okay, but if you delete your source folders it cannot generate the necessary files to run your already created projects. It will however allow you to create new projects, as you are still able to do.
Let me know if you have questions.
Thank you,