File types filter

[kevin at stallibrass.com]

newbee again....
 
Thanks for previous help with defaultFolder path
 
New question..
My standalone (Windows) saves a copy of a stack as a backup. I'm naming the
backup file .bkp so that I can filter for these files when I want to restore
them.
I then use 
answer file "Select a backup file to restore" of type "*.bkp" to view only
these file types
This works in rev but not when I create a standalone
Am I being stupid or did I miss something?
 
Kevin Stallibrass