Hello,
Is Muse asking for serial number or "License this Software "message on launch. Most of the time this happens because of Hosts file on the machine.
Please go ahead and rename the hosts file on your machine and you should be all set. here are the steps for both MAC and Windows.
Windows:
1. Go to following location. C:\Windows\System32\drivers\etc
2. Rename the file "Hosts" to "hostsold"
3 Relaunch Muse and sign in with your Adobe ID, you should be all set.
MAC:
1. Go to Finder > Go > Go to Folder
2. Type /etc and hit Return
3. Rename the file "Hosts" to "hostsold"
4. Relaunch Muse and sign in with your Adobe ID, you should be all set.
If it do not work please share few screenshot of the message you get.
Regards
Vivek