You will only see the "Launch App" button for the 1st time. Muse is already insalled on you machine. So, you can go to /Applications(for MAC) or Start->All Programs(For Windows) and look for Muse and launch it.
If you want you can create a shortcut or alias as well.
i'm having the same problem. i subscribed to Muse. i downloaded the App manager and downloaded Muse within that app.
tried to Launch App but nothing happened. it says Muse has downloaded but i cannot find it ANYWHERE on my mac?
sorry, but it is NOT in my applications folder (mac) is there any way i can download it again WITHOUT the App manager as it keeps saying it is installed and it is NOT! i have searched the whole computer for it.
when i try to uninstall via the trial installer (replace or uninstall option) it gets halfway through and an error appears. let's get this sorted please!
This is a user forum where Muse Technical Support and the Muse Development Team are highly active.
If you have an urgent support need, live chat support for Muse is available by going to <http://helpx.adobe.com/contact/index.html>, selecting "Muse" from the Products and Services dropdown, selecting the topic you need help with, clicking the "I still need help..." button and then clicking "Chat now".
You can download Muse from here, http://www.adobe.com/go/trymuse/
After it is installed you can sign in using your Adobe ID, if you have an active subscription on the ID then it should recognize it.