Adobe Camera Raw changes not loading in Flare

If you edit a RAW file in Adobe Camera Raw your settings are stored non-destructively in a database or "sidecar" XMP file. More about this here:

Apple's RAW engine (that Flare uses) simply reads the original RAW file, and ignores the edits stored in the XMP file that are specific to the Adobe RAW engine. Therefore Flare cannot reflect these edits.