Notes about the APG file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The APG file type is primarily associated with 'Active Page Generator' by Webgecko Software. An APG script is a text file, consisting of content blocks and script blocks. Active Page Generator executes APG scripts. APGen (short for Active Page Generator) is a script programming environment for pre-rendering Web pages and for generating other content.