Hello @OltcitRoom ,
Could you specify which object in the scenery editor you’re using exactly? I’m guessing it’s an apron?
When does the crash occur? Is it during saving, immediately after applying your texture to the object, or when opening your project?
If possible, uploading a video demonstrating the issue would greatly help us understand the process.
Also, see 2) Use “Report-An-Issue” to generate a crash report archive
Last thing : there is no need to uninstall or reinstall the SDK to test.
The DevMode and its editors are fully integrated into the game and the sdk is not part of the issue. 
Thank you,
Regards,
Boris