Even the screensaver wiki has the newer ".10.N" jailbreak:
https://wiki.mobileread.com/wiki/Kind...nd_3.x_Kindles
@NiLuJe: I know of at least THREE different occasions where people were confused by the version numbering of the jailbreak, thinking that .10 is older than the others because it has a smaller NUMERIC value.
@EdemaRuh: You said "even after the reboot", so it appears that the "Update your Kindle" menu item was not used in this case. Updates cannot be applied by rebooting. You MUST select "Update your Kindle" in the settings menu, and it is only available (not grayed out) if you have the correct jailbreak installed, and the correct update on your kindle USB drive.