If you have a paid subscription (or a free trial) you should be able to do it from anywhere as long as you are logged into flow.
If you don't (like me)...here is your workaround, I think...I've never actually tested it.
Open the Flow in Pad. For each subflow (including Main), Select All->Copy, Open Notepad, Paste. You will see the text code version of what you copied out of PAD. Send the text file(s) to the laptop.
Open PAD in the laptop, create the flow, create each subflow, copy the text files and paste them in each respective subflow. You should be good to go.
