I received dozens of emails about this error :
Cannot apply value ‘null’ to property Login: Value cannot be null
Zoltix also contacted the support on the forum http://kankuru.com/forum/topic/after-update-cannot-apply-value-null-to-property-login-value-cannot-be-null/
I just released the version 188.8.131.52 to fix the bug.
Thank you all for your patience 🙂