Well ECUFix doesnt work on some of the less common software versions. Its not a bad tool, but its has its limitations. Im sure I could contact andy and he may be able to add the file to the repo. However I dont think that your issue is flash related.
When writing the readed file it has no issues with p0601
Found 1 of the 2 rsa check skips. Did change manually. Now it will run, after turning off i have to take battery off/on and works again untill turning off again. Before the skip thing what ecufix does it had p0601 inmediately after turning off and wont start. Disabling rsa would fix all issues