@kana48: Can you provide the crash dump for the manager issue? I'm not able to reproduce it here so it's probably related to one of the tasks you have in your list.
Sorry for the delay to response.-
I have followed your suggestion. You may download the crash dump file from this link
due to it is too much big for attaching.
The issue is present with a Rainlendar 2.11 BETA build 126 too.
The dump file has been created using only a command line ProcDump.exe -e -t Rainlendar2.exe
from "Command Prompt".
I hope it is enough to understand the reason of the issue.
Thanks a lot for your kind attention and have a nice day.