I'm using 2.7.0 on Windows, and have a few suggestions:
1. Add a "Check for Update" item in the menu, as an easy way to know if a more recent release is available
2. In the About dialog, add the precise release number, make it selectable as an easy way to copy/paste, and add a hyperlink to the site so users don't have to manually type the URL in their browser
3. More important: Make it possible to select multiple segments with the A/B buttons: Currently, when I need to trim a video by extracting multiple parts, I have to resort to Shotcut, which is slower than AviDemux.