Hello. I switched from the Clover to Groupy just recently. I love it very much however there are 2 functionalities that I am missing very much.
- Middle click on folder - to open a selected folder in new window as new tab (or grouped)
- Double click to go back - to go back one step in folder hierarchy when double click somewhere in the blank space of the opened window
This two function are present in Clover and Qttab which are similar software's and I miss them much in Groupy. It is a very useful functionality saving a lot of time and making you more productive which is the point of software like Groupy.
So, it would be great if you could add this functionality to Groupy.
I assume a lot of your customers will appreciate that! 
Martin