which program did you use to enter the Raspberry Pi with version 2.26 without success (or 2.22 successfully)? I have just tried an image updated to 2.27 and could login as root via PuTTY.
Samba Shares and the Kernel and Package Updates are available in the „Filesystem/Mount“ and „Raspberry Settings“ menus of Max2Play’s browser interface as well. Have you tried that?
Did those features work with the 2.26 image whereas they don’t wit hthe 2.22 image?
Maximilian from Max2Play