A single license/subscription of Foxit PDF Editor, Foxit PDF Editor Pro or Foxit Editor for Mac can be activated on one computer at a time.
Although Foxit PDF Editor, Foxit Editor for Mac or Foxit PDF Editor Pro can be installed and used on one computer at a time, with a single purchased license/subscription, you can deactivate the software on one computer and activate it on another.
Please reference the articles below to deactivate your perpetual license or subscription
If you would like to activate multiple computers this would require you purchase a license/subscription per computer. For example if you want Foxit PDF Editor, Foxit Editor for Mac or Foxit PDF Editor Pro activated on 3 computers simultaneously this would require you purchase 3 license/subscriptions.