Thank you for your quick reply!
I then read this tutorial for setting up ADE in Wine:
I don't have an e-reader, but double clicking on the ascm file opened it in ADE under Wine. Then it downloaded a protected PDF in my home directory for offline use. ADE for Windows ran surprisingly fast on Ubuntu 12.10, and it opened up all the notes/bookmarks and pages. I haven't found a problem with it yet other than trying to open the ascm file from within the ADE interface.
Thanks again.