If you follow this blog, you know I'm in need for a +30years certificate.
Flash Builder wizard generate 25 years certificate only
generate the certificate myself!
Again, thanks to keytool :
keytool.exe -genkey -keyalg RSA -storetype pkcs12 -alias <your_key_alias> -keystore <certificate_file>.p12 -validity 12000
Enter your password when requested only and fill the questions to complete
Note the -validity value is waiting for a number of days (not years!) so 12000 is about 32 years