Lost audio in all my articulate presentations

When I publish my articulate courses I no longer have audio for the courses?  I did when I first opened the course and then I deleted just one slide (that had no audio associated with it) and saved it as a new version, but it had no audio.  Went and then deleted that version and reverted back to the original version and now it no longer has audio.  Went and then opened a completely different course and it did not have audio either and I had not even worked with that course.  Tried it in preview and published mode and nothing seems to work.  Any ideas on what might be causing this?  This is a lot of audio we have lost. 

Thanks.