Just picked up Groupy and really liking it so far. I would like to propose a few enhancements that would be very helpful.
1) When automatically grouping two windows, provide a settings option to restrict grouping to windows that have the same process name. I like to group by application but I keep unintentionally grouping different programs together. I found the option to enable this but it was very easy to miss in the settings (see #3 below). Maybe give the option to override this restriction so that we can combine two different applications as needed?
2) Provide an option to exclude a grouping by window title and parts of the title. Your competitor does this and it's very useful. Here is an example. I am a software developer and frequently need to open the browser's debug tools in a separate window so I can work with them side-by-side. It breaks my workflow to have the debug window open as a tab. If I could configure the Groupy settings to automatically group a new window from an application (which it already does) while also being able to exclude a window whose title starts with "Developer Tools", that would greatly increase the flexibility and power of Groupy.
3. As other people have commented in this forum, the color contrast in the settings makes it very difficult to determine what is actionable. By that I mean the "off" state of the checkmarks are too light. A lot of people have a difficult time with contrast issues.