The convertshots.zip file you have requested: Tools and Utilities / Other / Convert Screenshots - 86.17kb is not available. Perhaps try browsing all files for the game World of Warcraft and upload any files you want to share or are missing. This is the only information we could locate:
Put the ConvertShots.exe in the World of WarcraftScreenshots folder, and run it. Convert all your screenshots from TGA to JPG!