Created attachment 109857 [details] the critical KRITARC file after deleting KRITARC file it worked - But I had to reinstall bundles and brushes Here I send you the KRITARC file which made the misstake. I run WIN 10 64bit in german. Krita 4 now works ok Many thanks for all you did ! kind ragrds Hannes.
*** This bug has been marked as a duplicate of bug 384774 ***