I have installed the app many time but now can install on 1 iMAC machine. On trying to open app, no window appears to allow for next steps. I have checked for hidden windows and there are none. I do have a “?” in the Webroot app Icon in the Dock.
Best answer by TripleHelix
You need to have Mac Version 188.8.131.52 installed so see here and there is a Direct Download Link so you have to uninstall your version and install 184.108.40.206: https://community.webroot.com/home-product-releases-27/product-update-mac-version-9-1-4-123-345361
Here is the Direct download link for this version and it will only work on Catalina and Big Sur!