For lessons that were created in SoftChalk Create 8 or Create 9, you can make edits in Create Online and save. At that point, the lesson is a Create 10 lesson and will no longer be editable in a lower version of Create.
Lessons created in SoftChalk Create version 6 or 7 cannot be opened in Create Online. (You can open and save these lessons using the most current version of SoftChalk Create and then they will be editable with Create Online.)
For more details on Create Online, please see the SoftChalk Cloud Guide and the SoftChalk Cloud website.