Ummm, the Surface Pro may have tablet features, but it's in the ultrabook class, not tablet, as it runs Windows 8, not RT. It's more laptop than tablet, and I run it plugged into a docking station with a mouse and keyboard, plugged into a second monitor, with the full, official Windows version of Google Chrome web browser, which I do believe is officially supported by Webflow.
Furthermore, my screen resolution is 1920 x 1080, which I believes also falls under your supported screen resolutions. The Surface Pro is no less a capable laptop, than, say, the MacBook Air. I have no trouble running Photoshop, Indesign, Illustrator . . . Heck, even Webflow's actual UI works flawlessly.
Having said that, I can admit I'm a little biased. I'm a paying customer, so of course I'd like to argue that I'd fall under the support blanket. After all, you do have my credit card number.
Getting to the issue, it still doesn't work when I disable high DPI, which I just tested today. I even disabled the Surface Pro's screen and was running solely on the second display. When I click on the button to upgrade my account, the screen just "greys out" as if preparing for a modal popup. But I never actually get to see the popup. I can click on the grey overlay to return to Webflow, but that's as far as I get.
As I mentioned, Webflow's interface itself works well. It's only the admin UI that is not functioning properly. I mean, that part should more or less should function as a basic website, not a "web app". Modal popups are a pretty trivial feat when it comes to web development. I've never been to a website, where they didn't work before on ANY tablet, phone, laptop, "android" (wat), or desktop.
I'm convinced that the problem can be attributed to an error somewhere in the CSS. Heck, I could even try to write a patch for you guys if you want. It should only take a couple lines of code. But I'm sure it wouldn't be as clean as what you guys could come up with if you put your minds to it.
Please forgive me if this reply comes off as cheeky, it's just that I don't really appreciate receiving what appears to be a stock reply to what I believe to be a legitimate support issue. I love using Webflow, and it's really changed my entire workflow in the best ways possible, and I'd love to continue using it in the future.
A big fan,