TortoisePlink.exe needs to be TortisePlink.exe
Created originally on Bitbucket by jbeekman (Jared Beekman)
Setting up THG and tried to push my first commit and got this error
remote: '"TortisePlink.exe"' is not recognized as an internal or external command, remote: operable program or batch file. no suitable response from remote hg
It took me a while, but I discovered that the file installed was named TortoisePlink.exe and not the TortisePlink.exe Workbench was expecting.
Copying the file and renaming it seems to have worked.