This page is a static catalog. It does not run an account, and it does not send what you type to MxUtils.
The Hi, ask for Help button on the catalog keeps a name, email, subject, and note in this browser only. That list stays on this page. It is not sent anywhere.
Download buttons open a SourceForge file in a new tab. SourceForge, itch.io, Cloudflare, Google, and Bing have their own policies for those sites.
Each tool keeps its own settings on your PC after you install or run it. 2wL uses %APPDATA%\2wL. Monocul uses %APPDATA%\Monocul. AudioCapture uses %APPDATA%\AudioCapture. x15 keeps saved layouts in the dumps folder next to x15.exe. myhome stores the layout in the browser’s local storage for that page.