kgillibrand
commented
8 years ago Had this problem myself.
If you go to the installed applets directory: ~/.local/share/cinnamon/applets and look for WindowListGroup@jake.phy@gmail.com.
Enter that directory and edit the metadata.json file.
Change "max-instances": 2, to "max-instances": 3,
Setting it to -1 will remove the limit entirely.
I have 3 monitors setup, and I would like to place this applet on all of them. However, after I've added it to 2 of them, I can no longer add any.