Hey Chris,
I'm flabbergasted that the developer still has no understanding of what batch processing means.
JPEGmini still won't even take files from the Finder dropped onto the Finder icon like any normal application would. I still don't have anything nice to say about their UI design.
Meh...
A couple of worthwhile threads to look at:
Go to specific folder in open/save dialogs
Tell when Open/Save Dialog or Go To the Folder is available
A working demo macro:
Send Finder Selection to JPEGmini v1.00.kmmacros (11 KB)
This is total brute-force, and it shouldn't be necessary.
The silly app even beeps when I manually click the Go button in the open dialog's Go-to-the-Folder sub-dialog with my mouse.
If I had to use this app every day I'd buy Default Folder, so I could directly script the dialog – and then I'd start fussing at the developers on a regular basis.
(NOTE – I already own a copy of Default Folder.)
-Chris