I have not seen any reports of trouble with TechTool Pro 10.0.1 caused by updating to macOS 10.13.6, and there is nothing in the description of the update that suggests it could cause such a problem.
MicroMat Inc
Makers of TechTool
The administrator has disabled public write access.
Those of you who are considering installing the macOS 10.13.6 update should read this important MacInTouch discussion, which urges users not to power down the computer while the system software update or firmware update are in progress, even if progress is not apparent to the user: