Flattery will get you nowhere :-)

there's the ChangeLog but it's not particularly helpful. Most entries point to documentation updates, but some entries don't clarify what's been changed at all.

Probably some bugs have been fixed, and possibly some security issues. There might be serious issues with your old script, but I'm not sure.

Anyway it's likely you can just copy the configuration section of your old script to the new version. If it doesn't work you can either ask here for more help, or just use the old version.