There isn't an option"download by XXXX" in the content menu(right click menu)? For me I installed orbit downloader and enabled the options in AB options>add-ons>IE plug-ins ,just right click the download link and choose download by orbit.
Have you enabled Browser Helper Object regarding the Free Download Manager ?
Check whether it's checked in Tools->AB options...->Add-ons->IE-plugins.
Please provide the following information before reporting problems: Avant Version; System(also point out it is a 32 or 64-bit OS);IE; Memory Size; CPU Speed; Optional: Firewall; Graphics Card For the problems hard to replay, could you add me into your MSN or Skype list if you use either of them? The advantage is that you can let us know the situation in the first place by making some screenshots, sharing your screen or explaining the specific problems more clearly when they happen. E-mail: Jasmine#avantbrowser.com(please repalce # with @) MSN: dishmoon#msn.com Skype: JasmineThunder