Zwift hangs after 5/24/21 update

Zwift hangs on slide show during launch after 5/24/21 update on a Windows 10 PC, approximately 8:05pm PST. After 15 minutes, closed it down and started again. Hung up again on slide show for about 10 minutes and then automatically shut down. Launched a 3rd time and hung up again on the big blue and white “Z” screen. Deleted my Prefs folder and restarted the computer. After over 35 minutes, Zwift finally started. Needless to say, I only had enough time left to complete about half of my planned ride – a real pain in the butt!