You can import Microsoft Project file with the format .mpp (if it is not .mpp file, save it in that format before importing).
The file can only be imported into FoxPlan if no resources have been assigned to the tasks. Otherwise, the file will fail at the time of import.
FoxPlan will import Tasks and Dependencies from Microsoft Project.
To start importing, go to the menu "Project" and "Schedule".
Create a new project.
Click on the "Plus" button and then "Import Microsoft Project File (.mpp)"
Then select your file and add it.
You will now see the content of your .mpp file in FoxPlan.