On Monday, October 1th, SIMEX will be launching a change to its two-factor authentication system and will be switching from Authy to Google Authenticator.

You’ll be able to use any two-factor auth apps: Google Authenticator, Authy, 1Password, etc. 

All you need is to reactivate two-factor authentication in your account. 
Also, for security reasons, we recommend to update your password to a more complex one.

Best regards, the SIMEX team.