Reflashing over writes old system files with new.

Command what we are suggesting you to do is: flasher -f -F main.bin

With that command you wont lose your data stored in MyDocs.

Theres backup files from messages, contacts, emails and even settings stored in MyDocs.

You control your flasher from your Pc command line.
Open it as administrator:

Open startmenu on pc.
Type CMD to search field.
Right Click it and open as administrator.
Now follow guide and type in commands.