Sadly, we didn't implement support for installing older versions of a plugin. But you should be able fake it manually, by editing the packages.config
file in the %APPDATA%\JetBrains\ReSharper\vAny
folder and adding a line such as:
<package id="ReSharper.GoToWord" version="0.9.1.1" />
If you restart VS now, and go to the extension manager, you should get prompted that some extensions aren't installed, and clicking the package restore button should download and install the right version.
Have you reported the issue on the project's GitHub page? https://github.com/controlflow/resharper-gotoword/issues