Why does quicken log in screen keep showing when launching quicken program. very annoying?

Are you located in the United States or Canada? Or somewhere international?
Are you frequently changing your Internet access to come in from different IP addresses? Home Ethernet today, Starbucks WiFi tomorrow, etc.

After signing in to your Quciken ID as you start Quicken, please do this after you're up and running:
- Go to Edit / Preferences / Quicken ID & Cloud Accounts
- Click the "Sign in as a different user" link on the right side.
- Sign out, then sign back in to your Quicken account using your existing Quicken ID.

See if that makes Quicken remember your Quicken ID between sessions.

Also please make sure that Quicken is allowed to update and save its configuration files. Please check if Windows Defender Controlled Folder Access feature Ransomware protection is enabled.
If it is, configure it to add Quicken as an "allowed app" without turning off Ransomware protection. Perform the last step in