Note: The nablet plug-ins and the legacy Sony plug-ins cannot coexist on the same system. Having them both installed will result in unpredictable behaviors of the editing application.
Okay. Um... That sort of begs the question: How do I uninstall the old Sony plug-ins?
Maybe Avid's website will help (oh my god, I can't believe I just typed that sentence).
Please uninstall previous AMA plugin, prior to installing any updated AMA plugin.
XDCAM AMA Plug-in Uninstall Instructions Mac:
1) Navigate to <SYSTEM DRIVE>/Library/Application Support/Avid/AVX2_Plug-ins/AMA/
2) Delete the MVP_SonyXDCAMEX.avx and SonyXDCAM.avx files
3) Empty the Trash to completely erase the files from the system