The Tinderbox app (eastgate.com/Tinderbox/) file uses XML to store its contents even though the file extension is “tbx”. In DEVONthink, the “tbx” file is treated as XML file, and when I click the tbx file in it, the DEVONthink editor is launched to show XML code. I can right click to use "Open With -> TinderBox (default)’ to open the tbx file in the DEVONthink, but I wonder if there is a way to open the TinderBox when the file extension is “tbx”.
Press Shift-Command-O to open it in the system default application. Cheers! 