Is there any way to make the popup menu not show certain file extensions? I notice it doesn't show hidden files(I think you can change that), but is there a flag or anything that can hide certain files with certain file extensions? Thank you.
no...but you can set it to show only ones of a certain file extension.
Straight from the docs...
Note: You can limit the content for a DynamicPopupFolder by using pattern matching. If the DynamicPopupFolder contains another folder, that folder must match your pattern in order to be displayed.
Example: *Popup "My Documents" !PopupFolder:"C:\My Docuemnts\"*.doc
Multiple directories can be placed in the same PopupDynamicFolder by using the pipe character, "|", to separate them.
Example: *Popup "C Drive" !PopupDynamicFolder:$Programs$|"C:\"