Pixinsight License File Location Link
If you lose your license file, you can usually retrieve it by logging into your PixInsight user account on the official website and re-downloading it. However, keeping a local backup saves time and ensures you can get back to processing your astrophotos immediately.
~/.Pleiades/
~/Library/Pleiades/
/Users/JohnDoe/Library/Pleiades/pixinsight-license pixinsight license file location
/home/johndoe/.Pleiades/pixinsight-license If you lose your license file, you can
C:\Users\[YourUsername]\AppData\Local\Pleiades\ If you lose your license file