Hi hp,
The replays from your WGT profile that you saved to a new folder has to have it's original destination for those files to be viewable from the new folder. When you deleted the replays from your profile, the new folder couldn't open something that didn't exist.
When you save a replay from the game-client, the files destination is the new folder you create, and not your WGT profile. You'll be able to move the new folders wherever you want, like your documents, briefcase, or wherever. Once your done, double click your desired replay to open the file.
Use the above steps to create a new folder.