If it's encrypted then it's not translation it needs but decryption.
When you create a save file, that cannot be edited with notepad, indeed. But the online editors should be able to decrypt it as part of the process. So my current theory is: you aren't actually uploading your file and instead you just open it in another tab, thinking you uploaded INTO the editor but no.
Small note: Met 'Valkyria' (with Daniel & Björn) on game-day 104at Marston Avenue . So finding her the first time (day 43 or something) doesn't seem to be an absolute must.