Some more topics to think about.
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topic 6
Like %Inter active%
i would like to use f.ex. %FileName% ...but want to be prompted for preview and/or modification.
Maybe an option to add an question mark some where to be prompted? like ?%FileName%?
That would show an dialog with the current path & file name and would allow me to modify what i see.
f.ex.
Command: BackUp.cmd
Arguments: ?%FileName%?
I would get and modify: [ BackUp.cmd C:\Test\
FileName *.cpp]
or f.ex.
Command: grep
Arguments: ?%FileDir%?
I would get and modify: [ grep C:\very\long\path\
test work\new]
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topic 7
The output of unix tools may use an "unwanted" EOL option.
Maybe you can provide an option to provide the output whit DOS EOL chars? Instead of use the function from the menu myself.
EDIT:
or i could use the proper parameters of this tools

-U, --binary do not strip CR characters at EOL (MSDOS)
forget this topic

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topic 8
Often we have an inter active "parameter" and "work dir" at the same time.
Maybe you want to provide an new tag which prompt us with this two parameters in one dialog?
Or even more to get all possibilities?
--------------------------------------------------
Parameter: [ ] [V]
Path: [ ] [V] [Browse...]
Parameter: [ ] [V]
Work Dir: [ ] [V] [Browse...]
--------------------------------------------------
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topic 9
How about "prefilled" %interacitve% parameters?
Like
Command: grep
Arguments:
%Options {-i -m1 "here your search term"}%That way we can provide valid parameters to an tool
and don't have to make this "hard coded"
Like
Command: grep
Arguments:
-i -m1 %here your search term in quotes%-------------------
.