I have now looked through the mrp report, and the installs for KUALBooklet_v2.7.2, and KUALBooklet_v2.7 both succed. But it writes this with both the install and uninstall .bin for the Scrensaver plugin
"(ss 0.47.N LEGACY I) is not targeting your device [0G1 vs. 02 03 04 05 09 08 06 0A], skipping . . .

"
As a last deperate effort I tried installing the k4 version - this gave the same result(supposed it would, too).
Maybe I've done something really basic wrong, but I still cant seem to figure out what - maybe it is just too long since I have meddelt with my kindle
Oh and here are some of the bug report - say if you need more:
[2018-02-28 @ 13:52:01 +0100] :: [MRPI r13359] - Beginning the processing of package 'Update_ss_0.47.N_k2_dx_k3_install.bin' (ss 0.47.N LEGACY I) . . .Package 'Update_ss_0.47.N_k2_dx_k3_install.bin' (ss 0.47.N LEGACY I) is not targeting your device [0G1 vs. 02 03 04 05 09 08 06 0A], skipping . . .
[2018-02-28 @ 13:51:59 +0100] :: [MRPI r13359] - Beginning the processing of package 'Update_KUALBooklet_v2.7_install.bin' (KUALBooklet v2.7 I) . . .
--Running 'install.sh' for 'KUALBooklet v2.7 I' (Update_KUALBooklet_v2.7_install.bin) @Wed, 28 Feb 2018 13:52:00 +0100system: I ota_script:install::installing bookletsystem: I ota_script:install::registering bookletsystem: I ota_script:install::creating applicationsystem: I ota_script:install::cleaning upsystem: I ota_script:install::doneSuccess!