How to run associated application?

[alex]

If you want to run associated application for your document (the same that would happen if you after double click on this document in Windows Explorer) you can do it with a tool feature.

Create new tool, and then do such not obvious thisng :
Instead of Arguments field, place %FileName% to Command field in the Tools Options dialog.
This should be done in case when you want to run associated application for your current document.
But the same is true for %InteractiveFile% and %MainFilePath%.