We are 2 people working with Adobe Muse. One of us has the actual program installed in his computer and me, who does the updates, go in from another computer. I do not have the actual program. We wonder now how we both can get access to the actual program and go in and make not only updates.
Hope for help shortly.
Each user needs to have a license to use software so you would need to purchase a license - see Web design software | Download free Adobe Muse CC trial
As Beverley mentioned, you would both need a licensed copy of Muse. But I'd like to add to that if I could.
1: In order to use Muse it requires access to the .muse file so you would also have to store that .muse file and all site assets in a shared location to avoid overwriting each other's edits. The Creative Cloud or DropBox works well for this if you are not both on the same internal network
2: Depending on what kind of edits you are making on the second computer you may want to check out the 'In Browser Editing' capabilities of Muse sites.