Adding applications to Open document with dialog

I am stuggeling with the Open ducument with dialog box.

When installing Power RailTrack and PowerCivil I automatic get an entry in the dialogbox, but how do I edit this entry.

I want to add some commandline arguments (the projectnumber and fildername). I was able to do this with the MicroStation entry, and this is working fine.

I have tried adding a new entry to the application through the Admin interface, but I'm not able to see this in my PW Explorer. (see. images for proof).

Furthermore the Description for the standard entries give no meaning. Where do I change that.

My Open with dialogbox (logged in as administrator)

The properties of the PowerCivil application in the administrator module