PSE requires an update app??

I use PSE 2026.  After replacing my iMac (which runs MacOS Tahoe), I now find that when attempting to close PSE I get the error message shown in the attached image. I have no idea what app should be on my system. Clicking "Cancel" just removes the message but does not allow me to close PSE. Seems the only way to close it is to install the app, whatever it is.  Can anyone comment?  Thanks.