I installed Groupy and it is unusable in Excel. I have 2 documents open and have the 2 Excel windows grouped but when I use the arrow keys to try to navigate between cells on the active spreadsheet, it shifts me to the other spreadsheets. It's like the arrow keys are permanently mapped to shifting between the different files in the group. I have this problem whether hot keys are enabled or not. ALSO, when I try to use the mouse to navigate within an open spreadsheet, every time I click on a cell, it causes it to jump to the other document. There is no way for me to use Groupy the way it was intended.
This is on a Windows 10 device with Office 365 installed. Core i7 desktop with 32GB of RAM.