There were SO many changes in the back end of Lectora between 11 and 12, the two really aren’t compatible because of how those elements are built behind the scenes. Well, not backward-compatible, anyway. Let me try to explain…
That being said, you can take a title from v11 and import it into v12. Lectora 12 will create a “back up” of the v11 file with the extension of .awt12, and save the new version as simply .awt in Lectora 12 format. But, unfortunately, you can’t take a v12 project and open it in v11 because the back end needed to work with the page elements created in v12 (buttons, images with styling, etc.) just doesn’t exist in the previous version of Lectora (11 and earlier).
You would notice the same sort of “missing element” problems if you created a title in Lectora v11.3 that utilized the completion tracking check mark functionality, and then opened that title in Lectora 11.0 – those elements would disappear because the back end that supports that feature isn’t there.
Hopefully that explains why you’re having this problem… but if you need more info or have any further questions, just reply here and we’ll help you out!
We’re aware of an issue in Lectora 12 where images don’t display when IE11 is being run in compatibility mode – essentially acting as if it were in IE8 or earlier. You can test if this is happening to you by opening IE and selecting F12 to open the developer tools. Then select the Emulation tab and check the Document mode.
We’ve got a fix for this issue coming out in our next update, due out shortly. We’ll send an email when the update goes out, and you can review the release notes (once posted) here at that time: http://trivantis.com/service-pack-downloads/