Having just visited the MicroMat home site, I now see that with macOS 10.12 I will need to upgrade to TTP9 for Sierra compatibility....
I haven't upgraded DiskWarrior and TechTool Pro past v 4 and v6, respectively, and still won't for Sierra, because their downloadability has made them instantly obtainable if I ever need them.
DW isn't as bad as TTP which is now three versions past my v6, and who knows how many more will come and go before I
actually need a
current version.