changing an ".ost"file to open with "unknown" application

[objects]

changing an ".ost"file to open with "unknown" application

I changed my outlook email .ost file to open with auto cad by mistake. Initially it was opening with an Unknown application. How can I enable it to open with an unknown application again? please help

 

[carwiz]

You can try this tutorial and see if it helps.

http://www.sevenforums.com/tutorials/19449-default-file-type-associations-restore.html