You can install AliExtractor on multiple computers as long as you are the sole user. This is why you are required to authenticate yourself using a Facebook or Google Chrome account, so that your access to AliExtractor would be possible on any device you log into. All computers must also have Google Chrome installed in order to run AliExtractor. At this time, AliExtractor does not support other browsers like Edge or FireFox.
Simply go through the same process as you did the first time you installed AliExtractor. (How to install AliExtractor after purchase) After installing the extension, authenticating yourself, and entering your license code, the AliExtractor extension will be ready for you to use.
Important note: When you are asked to sign in with Facebook or Google Chrome, you must use the same sign in information that you used when previously authenticating yourself. Otherwise, it will not install.