Open older version (or wait a bit if running) and press "Yes" when asked about the update to open the update page with all updating information.

v.4.00

• New look with two themes: Light and Dark. Dark theme is only available for larger than 1400x800 resolutions because of larger sizing. You can still choose "Old Look" in settings for now just in case.
• Added "Leech from file" option for website. File must have one URL per line of that website with specific post.
• Improved when re-leeching multiple messages to show all errors at the end.
• Fixed conversion to HTML freeze issue in rare cases.
• Fixed few leeching problems.
• Other small improvements and fixes.

For previous versions changelog: click here