Thor installs FoxUnit 1.66522 dated 11/09/2017.
Issue #1: after installation, FoxUnit does not appear in Thor's list of applications as expected.
Issue #2: launching the Thor-installed foxunit.app directly from the VFP command window crashes VFP.

Debug shows it's a C5 error:

Downloading the FoxUnit source code from here on GitHub and then building foxunit.app from the VFP project gives version 1.70, which runs as expected.