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Thank you for the reply but I'm still lost. When I click onto "associate file types" in either PlanMaker or TextMaker it opens up a window that says: Default apps choose default apps It then lists email, maps, music player, photo viewer, video player and web browser but nothing about files...

I just upgraded from 2016 version to 2018 version and I cannot get Windows 10 to recognize PlanMaker or TextMaker as the apps that I want to use to open files. I have gone into both and gone to Tools=>Options=>System and then clicked on the "Associate file types..." button but I'm lost as ...