How can I undo an application to a program that needs a default program?

Bob Cat

Estimable
Mar 22, 2014
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4,510
Plz read the matter first then you can understand what my problem is.


Ok , first of all I bought the game from a friend and mount it in my pc.
Then I started installing it but it didn't installed (it shows I need something like arc)
At first , I didn't know that so I just want to do some experiment with it . I made a program named as data-1 to an application ! Now I can't bring it back.
So can someone know how to bring a program(that doesn't have default program) which became an application to its original form??