I've had something similar happen in a different application, but if your bug report has been not answered to day with no resolution or workaround in sight, I would assume that the program issue is rooted on the OS-level (no such issue on mac across several mac os versions), and is hard to figure out.
in my experience with past ArtRage versions, reported bugs or odd tool behaviors were fixed very fast, and the team rolled out an update to address things very promptly.
we have roughly a year until the next release.As I said, I always really loved ArtRage. That's why I'm so disappointed now. I'm still glad to have ArtRage 6 and will still have an eye on the further development of ArtRage. Maybe I will purchase some future version again. But Vitae is not interesting for me.
in the meantime, you can explore the alternatives, or you can focus on making the best out of artrage version you have.
if I remember this correctly, artrage team promised to keep artrage 6 supported for as long as it's offered for sale, so there might be a patch coming out to address your issue. I don't know. you can contact the technical support again, or message them on social media to get some clarification. they aren't very active on these boards anymore since Hannah left.
I understand the frustration, but the grass is really not always greener on the other side; artrage is still a great application with stellar paint simulation.
I'm sorry that your interface issues break your workflow so much.