Author here, happy to answer questions about the tool. I've shared my motivations for writing the tool on the ReadMe page in GitHub, and I'll elaborate on this with a blog article in the coming week or two. Some background on the tool:
HandyDash is a cross-platform HTTP, TCP, and IP monitoring tool, intended for desktop use. It is agent free, requires no installation, and saves all configuration to a single portable file. Simply unzip the package and run the executable, and within a few minutes you can view and edit nodes within the browser based UI.
Thanks.