Hi again jimk123,
Not a problem with the delay. Are any of the other devices on your I2C bus running at something other than 3.3V? It might be that you have, say, a 5V device on there that is pulling the lines up to 5V. You would not seen an immediate issue with the Qwiic Relay but over time, that may have damaged the I2C lines on the relays. That is my only guess as to what happened with the Qwiic Relays outside of a different hardware problem.
As for re-uploading the firmware, you would need an AVR programmer like this
. We have a tutorial for uploading to another product with the same IC here
. Once you get everything set up instead of the "Hello World" test, upload the firmware
Finally, you can absolutely set it up to receive e-mail notifications for a variety of things. I am not sure what the default settings are but to change them, first, go to the "Welcome, 'username'" menu at the top of the page and select "Change Password". That will open your User Control Panel. Next, navigate to the "Board Preferences" tab and select "Edit notification options" and you can select which options you want to have notifications e-mailed to you.