Box Edit opens files from Box.com according to the default program set on your computer. Box Edit downloads the file, reads the settings that your computer has in place for that file type and then launches the appropriate program.
If Box Edit is opening files in the wrong program for you, please follow the steps below to make sure that you have the correct program defaults set for you computer:
NOTE: There are some exceptions to this. Certain file types like .csv's have multiple options to determine the appropriate program. If you are still experiencing this issue with the correct default program set after following the steps above, please collect your Box Edit logs and open a ticket with our Support team.