Clipped from the pocketbook user manual (right at the end)
SOFTWARE VERSION UPDATE
To update a software version:
1. Select ‘Products’ on the manufacturer’s official site
www.pocketbook-int.com .
2. Select PocketBook Pro 602.
3. Click ‘Software and Documentation’ link (in the right part of the screen).
4. List ‘Firmware’: Select the latest SW version for PocketBook Pro 602 and download it (right-click on the selected file ⇨ ‘Save As…’ ⇨ select saving location ⇨ ‘Save’).
‘This page presents new applications for your device; you can also install new games, dictionaries, or read the User Manual’.
5. Copy file SWUPDATE.BIN to MicroSD card (optional).
6. Remove MicroSD card with new firmware update and insert it into
PocketBook Pro 602.
7. Reload PocketBook Pro 602 with the inserted MicroSD card by pressing ‘Reset’ on the device’ lower edge.
8. During downloading keep both ‘Backward’ and ‘Forward’ keys pressed until the message ‘Firmware update…’ is displayed.
9. Follow on-screen instructions.
10. When all settings are completed wait for the device to reload fully
11. To check a firmware version, select ‘Settings’ ⇨ ‘About device’.
Haven't done this myself yet, but will do tonight once i'm fully charged.
I guess you are at point 7.
but please do check that you do have the file copied to the root of your pb before reloading.
Good luck!