Installed and showing for network activation but not available on blogs

This is installed (uploaded zip via dashboard) but it's not showing up on individual blogs for activation. Any idea why?

I had it network activated, and it was working on individual blogs but on the main site the widget didn't display any results on the front end. Hence I network deactivated it and wanted to activate it just on the main site, only it doesn't show in the All installed plugin list.

Update: the widget works to display random blogs, but does not work to display recently updated blogs.