Blank Opening Screen

After a couple of trial runs and one as a plugin with Logic (which gave me the buffer size error message I thin you’re addressing), when I try to open MG3 I get a brief flash of the home page and then a black screen.

I have tried a complete delete and reboot of the Mac but this is still happening.

Thanks, yes, I probably have to do with the erratic buffer size message… update will come tomorrow.