Yeah, if you can get that file on the target machine, it shouldn’t be a problem to run it in this fashion.
First unzip the myDevices-1.0.tar.gz file with
tar -xvzf myDevices-1.0.tar.gz
This will create a folder titled myDevices-1.0. You need to be in this folder to run the install this way, so:
cd myDevices-1.0
Finally, you’ll need to run the installer specifying the invite code that is unique to you your account, with
sudo bash setup.sh -code YourInviteCode -v
where YourInviteCode is the letters and numbers after the underscore in the installer stub we provide you. So for example, if my stub installer is rpi_zcbxejx5ps.sh then my invite code is zcbxejx5ps.