Specs: MacPro 2012, Dual SSDs, One has Mojave, the other Windows10. Bootrunner works, but after I restart into windows for the first time, it will always shutdown/restart back into Windows. I have tried what I read on other forms, including selecting MacOS as my boot disk, and resetting NVRAM, and then disabling CSRUTIL. Any ideas?
Can you try version 3.2 and see if that works? Prior versions are available here:
tim