'Missing AAX Plug-ins' Message.

I have just done a complete re-install of Pro Tools First v12.3.1 (after following the guidelines for fully deleting a previous install and all the preferences etc.). However, once the First EQ Dynamics Bundle is re-installed (which I purchased!), only 2 of the 5 plug-ins show up. (BF-76 and Graphic EQ show up - Maxim, ChannelStrip and Gray Compressor do not.)

Also, when I load up my current saved Project, I get the following error message:
"One or more tracks contain plug-ins don't exist in your plugin-in folder.
Maxim (2)"
:confused:

Nevertheless, I can confirm that the plug-in flies are in fact present in the '/Library/Application Support/Avid/Audio/Plug-Ins' directory:

drwxrwxrwx 3 root admin 102 19 Feb 2015 BF-76.aaxplugin
drwxrwxrwx 3 root admin 102 19 Feb 2015 ChannelStrip.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 ClickII.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 DVerb.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 Dither.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 DynamicsIII.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 EQIII.aaxplugin
drwxrwxrwx 3 root admin 102 19 Feb 2015 Graphic EQ.aaxplugin
drwxrwxrwx 3 root admin 102 19 Feb 2015 Gray Compressor.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 Invert-Duplicate.aaxplugin
drwxrwxrwx 3 root admin 102 19 Feb 2015 Maxim.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 ModDelay_III.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 Normalize-Gain.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 Reverse-DC Removal.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 SignalGenerator.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 Time Shift.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 TimeAdjuster.aaxplugin
drwxrwxrwx 3 root admin 102 24 Nov 21:11 Trim.aaxplugin

Anyone have any ideas? I am really keen to keep using Maxim - love it!

Mac OS X v10.10.5
Pro Tools First v12.3.1.705
First EQ Dynamics Bundle v12.0.0.615

'Missing AAX Plug-ins' Message.