What is KeePass Professional Edition? When I Googled for that the best thing I could find is "Professional Edition" on this page: http://keepass.info/download.html
Is that what you mean? It looks like it's written using Mono for non-Windows platforms. I might have shied away for that reason. What platform do you use it on? I'd love to know if it works well on non-Windows platforms (OS X, Linux).
Yes, that's what I'm referring to. I mostly use it on Windows, so I can't really comment on how well it works on MacOS or Linux. My understanding though is that it's basically a straight port, so most of the same functionality should be available.
Another option you might want to look at is KeePassXC. It's a fork of KeePassX, and it has built-in (though off-by-default) support for keepasshttp.
"so I can't really comment on how well it works on MacOS or Linux."
Linux: rock solid for several years now. We have several KP databases shared by 20 odd people that contain several thousand entries. I use it on Gentoo and Arch desktops. It runs under Mono plus a few extras to do things like sending links to browsers and autotype etc.
Is that what you mean? It looks like it's written using Mono for non-Windows platforms. I might have shied away for that reason. What platform do you use it on? I'd love to know if it works well on non-Windows platforms (OS X, Linux).