Pace Interlock is the virulent DRM that DxO chose to bundle with all their software – even the trial versions. It's been so long I don't remember the details, but it's far more intrusive than Adobe's license management stuff. Especially in the context of open source software suggesting DxO anything is in poor taste unless they've ditched Pace.

Here's a little list of the problems Pace can cause:

http://web.archive.org/web/20071009193327/http://www.paceap....

Google suggests https://paceap.com/ i.e. DRM.