I wonder if this is an issue that only I am having? Neither 1.8.10 nor 1.8.9 will run for me on Windows 10. It does not seem to be blocked by Avast or anything in Windows as far as I have been able to discover. I installed it in C:\Program FIles\Dayturn and this was weird because I had to manually create that folder since no location was suggested as is usually the case. The little box appears saying it is about to run and then it just doesn't. Any ideas? Many thanks!