Hello, I am having the same issue.  Cannot de-activate AMEX downloads because QB keeps asking me to complete the last download.  Spent 30 minutes with a rep who finally agreed to help me for $74.99 one time charge after trying to force me to update to Online Version, buy and annual plan for $200+/-.

I agreed and granted permission for her to see my screen.  We got as far as resetting the installation of the last update and re-updating. This didn't help.  

She needed me to open an Internet Explorer browser.  I run Windows 11 which will not allow me to run IE.

At that point, we got cut off.

This is an Intuit problem that needs to be fixed in a new software update.