^^^^
This maties, +1. Arrrrr!
There is simply no existent, simple way for mobile & tablet users to edit save files.
You'll need to browse your portable unit's storage and doctor the file on a Windows pc before sending it back to your portable.
Online Minerva used to be my girl until it started corrupting things from the save files growing too large. Extranet spam mail, etc. TiTSed is my steady now, my girl does what I like for the asking and still allows raw editing. Not sure how slow it is on other systems, but it eventually goes right after a pause on an octocore x86 @ 5GHz.
...eventually. ;>