Prompt windows blocking use of Trados altogether

When I open Trados I get 2 windows prompting that I click yes/no, relating to plugins such as the SearchOnWeb.plugin, Worldserver, etc. I uninstalled these 2 plugins, but I still get these windows.
I used to be able to click on "No" and continue using Trados. But now I can't even do that, because the back window (barely visible in the picture here) does not show and I cannot click on it -- it has to be clicked first.
I cannot work in Trados at all.
Any suggestions please?
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