m250 4.x.x - can't see national alphabet

Hello.
Yesterday I have bought a Sansa m250 2Gb. Things I’ve discovered later - the m200 series are discontinued and my player can’t display Cyrillic tags.

What can I see in version.sdk:

#DO NOT EDIT OR REMOVE THIS FILE

Product: m2X0
FW: V4.1.08E
Region: Americas

Digging on this forum suggests me to change firmware from Americas to Europe - and then the player can display cyrillic.

How can I do this?

Some players have an option to boot as “recovery device”. Remove the battery, turn on the lock key, press “power” when connecting to USB etc. But this trick isn’t working with my player. Is there a way to connect my m250 4.x.x as “recovery device”?

Remove the battery, engage the hold button and just simply connect the player to your PC…