Simplify3D User Forum

On Dec. 4 I got an update from Microsoft (27 november 2018: KB4467682 (OS-build 17134.441)). Since then I can not use my Simplify3D software anymore. When I click on the icon to start the program the login screen is popping up. After putting in name and password I click "login". After a few seconds a message pops-up: My internet connection is working fine. I did made a re-install a few times, installed an older version of the software, installed the newest version 4.1.1 of the software. Same result; Connection failed.
I deleted the license from the Simplify website and made a re-install of the software. Same result; Connection failed.
I paused the Anti-virus software (Kaspersky) and tried again and again, no result.

What could be wrong? What possible options are left?

I made this solution:
First I installed Simplify3D version 3.1.0 and started the program.
Then through the menu "help" and "check for updates" I downloaded version 4.1.1

I left open version 3.1.0 and installed and opened version 4.1.1
After both versions were opened I closed version 3.1.0

Since then version 4.1.1 is working fine, so problem solved.