Box.BIC is an internal Dropbox-like solution that is used to store files for labs and individual researchers. This tool is at https://box.bic.mni.mcgill.ca and can be accessed using your McGill email and password.
The desktop client is used to synchronize files stored in Box.BIC with a local folder on your desktop. The desktop client for Windows, Mac, and Linux machines can be downloaded from https://owncloud.org/download/.
If you have an older operating system that isn’t compatible with those files, earlier versions of the desktop client can be downloaded from this page: https://owncloud.org/download/older-versions/