I might be able to help, as I recently imported a layout into MDP2 (Midi Designer Pro 2). Here is the way I did it:
- Set up a Dropbox account (dropbox.com) and upload the layout file there.
- Install Dropbox on your iOS device and log in.
- In Dropbox on iOS, find the layout file you uploaded, click the … button and select Export.
- In the Export window, click “Open in…” and select MDP2.
That should open the layout in MDP2.
While you are doing this, you might want to set up MDP2 to auto-save to your Dropbox account. That is in MDP2 at Config->Actions->Automatic Backups to Cloud (IAP).