The short answer is yes it does work.
For emailing the steps would be: (1) Do a s/r to your stick. (2) In Windows Explorer with the project folder on the stick highlighted in the right pane, used the right click and selected Send to, Compressed Folder. (3) Accept the name it offers for the zip file. (4) Email that zip file. (5) On the other computer, delete the folder with the same name in Shared Paratext 8 Projects on that (a second) stick, (6) Download/detach the file from your email program to a temp folder. (7) Open the file and copy the only thing in it to Shared Paratext 8 Projects folder. (8) Do a send/receive.
One caveat: SIL mail does not allow zip files (at least in the States where it is hosted by gmail). So you’ll need to either use other email addresses or use 7-zip format and its native format .7z. 7-zip is freeware. SIL mail does allow .7z files through.