Hi Natalie,
Can you be a bit more specific about the issue? Does it happen for any specific composition, if yes please share with us that composition in zipped file. I assume you are using 2014.1 version. You can have both both the versions of Edge older as well as the latest, go to this page HTML animation | Download free Adobe Edge Animate CC trial and select the version Animate CC (2014) from the dropdown version list and download & install it.
Regards,
Vivekuma