I had Adobe Creative Suite 5.5 Design Premium for Windows, purchased in 2011 from TechSoup (we're a non-profit). When I upgarded to Windows 10, I lost all Adobe Creative Suite products. Chat Tech Support sent me here. Chat Tech Support was able to reinstall InDesign CS4 only, but I cannot open any of my old CS4 files, and of course I'm still missing Photoshop etc. Please help, and thank you for your time.
You can download the installers from Download CS5.5 products. Be sure to pick the product that matches your serial number, which you will need for activation. If you don't have the number, and the software was registered, it will be listed in the account on Adobe.com that matches the identity used to register.