Gimp 2.8.22 (Scripts, etc. won't load (Mac OS X)

[brandi]

Using Mac OS x Yosemite 10.10.5. Downloaded and installed 2.8.22 after first removing 2.8.14. 

1. Filter drop down menu shows no filters 
2. Have tried to load scripts (e.g. FX Foundry) and plug-ins (Beautify), among others, several different times. Have done so both through Gimp Preferences and directly into the correct Application Support subfolders (e.g. "Scripts, "Plugins") but none appear in any drop down menu in the app itself. 
3. Have no "Refresh" button anywhere in the Preferences Scripts or Plugin folders  in this version, only "Reset" (reset to default vs. refresh).        

Have spent hours troubleshooting. Any help/ideas will be appreciated. Thanks in advance

[Ofnuts]

1) Edit>Preferences>Folders>plugins should show two directories, one in your user tree, the other in the Gimp installation tree (*)
2) The one in the Gimp installation tree should contain a file called script-fu (and will likely contain many others...)
3) That file should be marked executable (chmod +x .... if not)
4) Trying to execute it in a terminal should display no error but the message: /usr/lib/gimp/2.0/plug-ins/script-fu is a GIMP plug-in and must be run by GIMP to be used
5) Edit>Preferences>Folders>Scripts should show two directories, one in your user tree, the other in the Gimp installation tree.
6) Check that these are actually present, and contain scripts.

(*) You can also edit the gimprc file in your Gimp profile. It should have lines that read (script-fu-path "/path/to/your/scripts:/path/to/Gimp/standard/scripts") and (plug-in-path "/path/to/your/plugins:/path/to/Gimp/standard/plugins")