Cannot get shhlack to work on Win10 or Chrome

[SubEclipse]

Hey guys, I'm striking out here. Ideally, I'd like to get this working on Windows, however, I cannot get it to install properly. This is the output I get when running the bat:
shhlack-master\shhlack-master\release\standalone\package.json 1 File(s) copied shhlack-master\shhlack-master\release\standalone\shhlack.js 1 File(s) copied The system cannot find the path specified. "Backup File ssb-interop.js.bak not found, you'll have to do it manually" "Done! Press Any Key to Exit" Press any key to continue . . .

I can install the Chrome extension successfully, but after doing so, I cannot get shhlack to function at all. Alt+S does nothing, and the lock icon is not present in a chat. I tried both the version available in the chrome webstore as well as the 'load unpacked' method using the latest build of shhlack (1.0.9)

Slack version 4.1.2 64-bit
Chrome Version 78.0.3904.97 (Official Build) (64-bit)

Any help is greatly appreciated.

[bwenstar]

Last Slack version that Shhlack works with is 3.4.3 on Windows 10

[SubEclipse]

Are there plans to update Shhlack to work with current versions of Slack?