Options depend on whether you have a license or not.
If you are licensed, then export as .exe using Node-Wekit export.
If you are not licensed and are using the free version, you could:
Ask your friend to download the free version so he can open your .capx.
Export as HTML5 and host the files on a free server such as dropbox, googledrive etc.
Install C2 build (temporarily) 186.2 and use the export to Arcade option (build 186.2 is the last suported version until the new arcade comes out).