I'm still having this issue and can't use material editor therefore am losing out on a lot of money!
I can of course understand the frustration this will have cost and we are working on resolving this for our full release of 3.5 coming in about four weeks.
In the meantime, there are 2 possible workarounds you may want to consider:
- You can roll back to our release 3.3, which you can download here.
- You can change your system language to something other than Turkish. (If English for example is another language you speak well, you could try that.)
If any further inquiries come up regarding this or any other subject let me know, and thank you for a bit more patience.