Can't open ebook as getting error "AR could not open URL link (3).acsm because it is either not a supported file type or because the file has been damaged" even after loanloading a new copy of Adobe Digital Editions

I think the URLLink.acsm file got associated with Adobe Reader, can you please try opening it using Adobe Digital Editions?

1. Launch ADE
2. Select the menu item File--> Add to Library
3. Navigate to the URLLink.acsm file location
4. Choose the file type as "Adobe Content Server Message (*.acsm)"

   

5. Select the ACSM file and open it.

or Right Click the URLLink.acsm file and open with Adobe Digital Editions.

Hope this solves your problem.