BTW, 2.2.4.153 has a new URL to reset (wrong -> firmware <- wrong) z-wave stack to the version used by 2.2.4.148 and prior:
/hub/advanced/installZipgateway714
And another one to download 2.2.3 if it's gone from the hub after several 2.2.4 updates:
/hub/advanced/download223
I hope nobody ever needs these... but they're there just in case.