Because Photodex is gone, your installation file is your only lifeline. Back up the entire C:\Program Files (x86)\Photodex folder and your psetup.lic file to an external drive and cloud storage. If Windows 11 updates break the software, you will need that backup to reinstall.
Even after installation, Windows 11 introduces unique bugs. Here are the top fixes. proshow producer windows 11
Windows 11 SmartScreen might block the installer because it is unsigned (Photodex certificates are expired). Because Photodex is gone, your installation file is
Once installed, ProShow Producer v9.0 is a 32-bit application. Windows 11 is predominantly 64-bit. Here is how to make it run smoothly without crashes. Rendering failures / codec errors: