I had a chance to test the full version, much better than the free version I used before.
I reported a few issues, a new update available.

Version 1.2.1

• New: Added a threshold for the 'adjust to' functionality. This avoids big amplifications of very quiet or muted tracks.
• New: The key file can also be entered manually. For hosts that don't allow drag and drop.
• Improved notification to the host about parameter changes.
• Decoupled the internal preset handling from the hosts preset handling.
• Renamed the 'computer ID' to 'token' to reduce confusion.
• Fixed a security flaw in the copy protection scheme.
• Added additional code to handle the strange interaction from Final Cut Pro X.
• Bugfixes.

www.lufsmeter.com

This looks interesting. The idea of putting an instance on each track and setting a volume range seems like a huge time saver.

Plus it's handy for setting faders up mixes quickly.

I went the EBU R128 standard route over a year ago. This is a handy tool for that purpose although you can select any value you'd like.
I've been testing it out on tracks for mixing using sevral ways; on tracks pre-post fx & on group buses too. The results can be surprising, e.g. things I'd normally turn down in the mix need to be adjusted 2-3 db higher & I'll get an overall cleaner & better balanced mix.

When summed my mixes are -24 RMS so there's plenty of dynamics & headroom to deliver in any medium- dvd, cd, internet media/ Spotify, iTunes without the need to squash or limit that much at all.
I use simple vu's + gain staging to get them there but this can help for sure.
Another tool that some might find helpful or useful.