I mean, do you still have the original machine, runtimes, etc.  From that machine you could use the python script to gather the resources, copy that folder to your new machine and load the scenes from there.

If the problem is that your runtimes aren't setup correctly (the same as the original machine) the export tool should work for you.

Another option is to use a utility to sync the runtimes between the two computers.  Something like SyncBack.