TurboTax crashes upon launch after update

I have been using TurboTax Home & Business 2019 (download program) fine until the update of February 6. After I said yes to the update, TurboTax will now launch but then crash (the window closes) shortly after the program launches. I spent about 2 1/2 hours on the phone with TurboTax support. We uninstalled and reinstalled the program a couple of times. At their suggestion, I purchased another copy of TurboTax and installed it on my computer. Same problem - the program crashes shortly after launch. I was able to install the program on a different computer and it runs fine on that computer (both computers running Windows 10). More troubling, my TurboTax Home & Business 2018 program, which had been running fine, now crashes upon launch, too.

 

Interestingly, TurboTax Business 2019 runs fine.

 

Any suggestions?