AceProject does not allow to directly export to / import from /sync with any third-party application.
AceProject provides two mechanisms allowing you to develop interfaces with other tools:
In your Profile page, accessible by clicking on your avatar in the top right hand corner of screen, you can select “Last Viewed Project” as your “Welcome Tab” in the “Default Pages” section.
At https://login.aceproject.com/ , you may enter the e-mail address associated with your AceProject user in order to have an e-mail sent to you with your account login page URL.
AceProject does not support the concepts of “milestones” or “subtasks”. Depending on your specific needs, this FAQ might provide some feasible workarounds or not.
For a 30 day period, deleted documents are listed and can be downloaded from the Administration > Tools > Deleted Documents, which can then be re-attached manually to projects or tasks.