From version 6.0.1.2 (Jan 06, 2016), Jaksta Media Recorder and Jaksta Video Downloader, will automatically update their extraction engines from our servers when they are started.
The extraction engine contains rules for how to extract video download links from various websites.
The extraction engine is used when the URL of a video page is entered to download (or Drag and Dropped) or a Page URL is detected when in Auto mode. (Settings > Internet Downloads > Advanced > Page).
You can disable this via Get Support > Check for new version on start, however it is highly recommend that you dont as the engine is constantly updated to keep up with site changes with releases once every week or so.