Hello
You may install a copy of Adobe Muse CC on your primary computer and one backup computer, as long as you do not use the software concurrently on both machines. It is cross-platform compatible (Mac/Mac, Mac/PC, or PC/PC)
Please refer to Adobe Muse Faqs for more information:- http://helpx.adobe.com/muse/faq.html
Regards,
Prateek