As of April 20, it's no longer supported, no updates, but they still charge my acount $40/mo

I'm here to share some insight about the error you receive, dbubeckrd.

The QuickBooks Online Windows and Mac apps are written in an outdated desktop code version. Thus the reason the app stops running completely.

Not to worry, you can still access your QuickBooks Online account via supported web browsers. This is the reason why you're still being charged. To login into your account, I'd suggest following the step below.

1. Go to this link: https://quickbooks.intuit.com/sign-in-offer/.
2. Enter the needed credentials (User ID and Password).
3. Click Sign in with Email. 

I've also included an article that'll help you handle your QuickBooks Online subscription. This helps you continue enjoying using our product: Manage Billing, Payment, and Subscription Info in QuickBooks Online.

Please come back and keep me posted on your progress in logging into your QuickBooks account via browser. It's my top priority to ensure this gets resolved.