If you don't find the option go ahead and reinstall the program on your new computer, if you hit the limit of activated machines you will be given a prompt to deactivate it when you launch the program. You can also deactivate from the account page. See the following article
The idea that you MUST deactivate is an important one, but it belongs the older generation of apps before Creative Cloud. In Creative Cloud, just sign out. That's all. No need to uninstall anything, though if you're transferring it might make things cleaner, because Adobe apps, once transferred, won't work and usually have to be cleaned out and reinstalled.