How to re-edit Helper app for the "Browse File s” tool?

Hi


Background:

When using the «Browse Files» tool, if we try to open a file which XXE 
by default cannot open, we are presented with a dialog box which gives 
us some options for specifying the application that should open the 
file.

In our case, we wanted to define a helper app for PDF files.

First:

Since we use MacOS, we selected Preview.app as the helper.

However, while this subsequently worked, it had to issues that 
nevertheless made it NOT work: When opening PDF files, firstly, if an 
instance of Preview.app was already running, a second instance of the 
same app would be opened. (Second or more instance of the same app is 
generally not something we are used to on Mac, so this was very 
unhandly.) But even more seriously, we was told that the app did not 
have permission to open that file - which was basically an even stranger 
message, and at any rate a show stopper.

Second:

We of course wanted to remove Preview.app as helper app, and perhaps try 
some of the other options that the dialog box described under 
«Background» above offers.

However, how do we get back that dialog box?

Or to ask differently, how can we re-edit the helper app for PDF files 
that are opened via the «Browse files» tools?

PS: We also tried editing the helper app for PDF inside the Settings of 
XXE, but that did not affect the Browser Files tool.

Leif

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