Dear Maintainer,

When trying to open the file attached to an entry of the database, the file is
actually not opened. It show a warning dialog with text "Access denied".

Open an entry that has a file attached, go to Advanced tab, then in the file
section, click on Open. It will display 2 dialogs. One with "Access denied".
And below it, one that permits to select yes or no.

The expected behaviour is that it launches the appropriate app.

When running keepass2 version shipped by upstream on wine, the same action
opens the file with the appropriate app inside wine. The file seems to be
store in the %profile%\Temp\xxxxx dir inside the user profile.