If you are interested in getting Benf to run then I can look into the code to see what happened with 3.45D.
But first please provide more info.
When you first tried Benf, did you see anything on the screen?
Then you tried patched v3. Did it look or behave any different?
If I remember correctly, original flicker problem did not show anything at all. But it’s been few years ago since I messed with Benfs code.