Templates missing after upgrade 1.7 -> 1.9

I confirmed I had 4 templates, then upgraded from 1.7 (not 1.7.x) to 1.9 using the standard UI automatic update -- no templates are there now. The DB table uvwp_nbt_templates is empty.

The upgrade code does not appear to have a case for upgrading < 1.7:
if ( $current_version && version_compare( $current_version, '1.7.2' ) == -1 ) {
...

Any way to migrate the settings?