OK, well I certainly wouldn't recommend going back to a really old version of PM 4.6 as a solution. There is a reason why we release updates: bug fixes and minor enhancements.
As for your settings. Your Files tab looks fine. Your IPTC/XMP tab, however, needs some tweaking. When reading TIFF-based RAW files (CR2 RAW files are TIFF-based RAW files) you're telling PM to read embedded IPTC first and if that doesn't exist, it should read embedded XMP and if that doesn't exist, finally read the XMP sidecar file. But when writing TIFF-based RAW files, you've told PM you only want to create/update XMP sidecar files and don't want to embed IPTC or XMP, and moreover if PM encounters a file that does have embedded data, that you don't want PM to update it. These settings are the cause of your issues.
I don't know how long you've had these new settings or for how long you had your old ones and we don't know what your old settings looked like so it may be difficult to solve your issues with old files.
What software do you use to adjust your CR2 files?
At the very least, if you want to work with XMP sidecar files, change your TIFF-based RAW file read order to have XMP sidecar files read first, instead of as a last resort. And please go back to either 4.6.6 or the 4.6.7 beta in the Announcements section of the forums.
-Kirk