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Specifically you need to SSH into your ATV1 and post logs.
FWIW: Your system would have updated to Kodi “Jarvis”, which is a completely new version of Kodi.
A LOT has changed with Kodi since the previous version.
That means many of the add-ons won’t work, at least until add-ons developers fix them.
We’ve seen complete kodi startup failures when unofficial addons were installed, before updating to Jarvis.
I suspect, it’s because some of those add-ons run in the background, and when you upgrade to completely different version of Kodi, and the addon hasn’t been able to update to a compatible version yet, Kodi crashes.
Since XMBC 13, when updating to a new major version of Kodi I always do a clean install and then reinstall the addons and library.