You can sign in and sign out from the Axcrypt app in the below way.
File|sign in – now enter the AxCrypt credentials , then start the AxCrypt app.
File|signout or Exit from the Axcrypt app.
Please note: AxCrypt 2.x use a single sign on model where the same password is used to sign in to our servers and to protect your files.
If the above does not help, please provide more information about the issue.
Still,if you are asking any Query/issues, please provide more information about the issue and write a mail to firstname.lastname@example.org.