With Apple dropping support for 32-bit applications in the macOS that will follow Mojave, Pete Gates, the creator of the excellent free application PT Prefs, has been hard at work building a new 64-bit version ready for the next release of the macOS.
PT Prefs 1.7.0 Is An Interim Release
Pete explains that 1.7.0 is an early release of 64 bit version due to issues with newer versions of MacOS. Pete has also added a warning for deleting plug-in list with Pro Tools Ultimate.
Note that the page where you can check the version numbers of all your plug-ins isn’t ready yet. If this is important Pete says that the previous version is still available in case of problems.
What Is PT Prefs?
PT Prefs is a utility program for Mac OSX which can delete, backup and restore various preference and support files - Pro Tools preference trashing in other words! It doesn't delete any essential system files, they are all just settings which at worst can be manually re-entered. Sometimes Pro Tools benefits from having these files cleared out (after a crash/blackout etc) - Pro Tools remakes them with default settings when it is run next. Therefore if you are unsure which options to check it is safe to check them all, in fact if you are running this software due to a problem rather than as a matter of course I would recommend trashing all preferences, it's more likely to solve the problem.