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If you purchased an individual plan for Creative Cloud, you can install the software on two computers. However, you can use it on only one computer at any given time. To install Creative Cloud on a third computer, you must deactivate the apps on one of the first two computers.
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So your answer is "for one account" - No limit to the number of Installations (can be >2). Limit of TWO activated at any one time. Limit of ONE 'in use' at any one time.
Actually, I have Creative Cloud installed on 3 computers- work, home, and laptop. However, while I am able to sign into CC on the third machine and download software, I cannot launch said software unless I sign out of one of the other two machines. The 2-computer limit is stupid and outdated, EVERYONE who is using this kind of software has at least these three computers in their regular workflow...