For those who are new to this thread:

-- To stop QB from harassing you to login to their online account with your Desktop version or you won't be able to use QB:

-- 1)Firewall - blocking the outgoing connection 443 port for the QBW32.exe and QBW32xxxx.exe files. Note: xxxx = pro, premier etc.

-- And for those who aren't familiar with how to setup the firewall. Here are the screenshots(attachment image) with step by step and credit goes to Flyingkiwi!