https://www.volirium.com/en/volirium/support/software-maintenance-for-flytec-6020-and-6030/

V 5.02b(2019-03-18)

In rare cases, the screen appears rotated by 90° after an update, and with very
low contrast. Now the screen can be correctly aligned again with the key
combination "Arrow right" and "Arrow down" directly after switching on, during
the language confirmation.