I've installed editor in Windows 10 and unfortunately UI is borderline unusable. Some straight lines in objects are a bit distorted, but fonts are really messed up.
it is a known issue, however it does not appear in all configurations.
A solution is not straight forward, because it is not clear what causes the problem. I assume it has something to do with higher resolution screens that scale GUI's and text, but I'm not sure. The Lemur editor mostly looks good on monitor screens with HD resolution. Maybe you can try to set the display scale to 100% before launching the editor. Windows does not remember the GUI settings, they have to rearranged every time. And then, after editing, bring the display back to its original scale.