Welcome to the forum, @wbrath121. Do you have the same issue as the posters directly above, namely that you need to run an older version of Dorico SE on your computer because it doesn’t have the right operating system to run the latest version? If so, please let me know. If not, please just run Steinberg Download Assistant on your system and sign in: you can download Dorico SE from there, and I’ve added a license to your account, so you should be able to run it with no problems.