Anyone who had the unfortunate experience of using MAPLE TA 3.0 would have been staggered at the number of bugs associated with its release. It does not exactly fill you with much confidence with the software developers at MapleSoft.
Version 3.01 and subsequent hotfixes did resolve some issues but many others still remain such as not using the "Quit and Save" button to exit an assignment.

Does anyone know if version 4 has actually resolved issues arising from users not clicking the "Quit and Save" when leaving an assignment?

One way of doing this is by using the Course module option from the content manager menu