Ideally you should have backup installers just in case. The direct download links on Pro Design Tools website (by permission from Adobe) may not work with Student/teacher or volume licensed editions. If you had an individual license and you still have the serial number, it might work assuming you have an older operating system that can support it. Be sure to follow the VERY IMPORTANT INSTRUCTIONS.
NOTE: Creative Suite installers won't work on Sierra, High Sierra or Mojave without terminal workarounds.
NOTE 2: Creative Suite WILL NOT work on Catalina or Big Sur.
Nancy O'Shea, Product User & Community Expert
Alt-Web Design & Publishing ~ Web : Print : Graphics : Media