Thanks!
Tried aquasnap didn't work, AC kept pulling the window back to center.
Tried Windowmanager and it works!
http://www.desksoft.com/WindowManager_Download.htmAC does a crazy re center at odd times designed for single monitor use to keep things front and center. This overrides AC windows position and locks it to the location I want. Works for updox too. Takes some fiddling with settings to get it right but we can share settings here.
I was about ready to give up on the ultrawide hi-res display and go back to 2 monitors. I can now recommend 34" 3440x1440 ultrawide as a replacement for 2 screens. Looks beautiful and takes up less deskspace. Other high-res savvy programs like web browsers look crisp and sharp.
Running scaling at 125%: AC is a bit funky shapes and slightly small text, but sharp.
Alienware 34" 3440x1440 at Costco $800 with usual no hassle costco 90d return. Worth it!