File Extension ~~C File Format Microsoft Windows applog file ~~C stands for Microsoft Windows applog file. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Tips for migrating from Windows to Mac What is your current application migration to the cloud/mobile? Microsoft Windows getting old and slow?