This should fix the issue of the Instruction manual crashing and being unable to be reopened.
If you open the game and the Guide Book Button is still greyed out, go to:
C:\Program Files (x86)\Steam\steamapps\common\Nanomon Virtual Pet\Nanomon Instruction Manual
And open the Nanomon Instruction Manual application. THis will fix the issue.
Other small changes:
-Osmosis Trait now fills Thirst Meter over time
-Locked sections of the Guide Book show a Lock Icon
Thanks for playing the game! There will be more substantial updates soon!