When EBTCalc is running, right-click its icon in the taskbar and click "pin to taskbar".
When you see the following window:
You'll need to click the "More info" link, and then click "Run anyway":
Linux (Intel/AMD 64-bit, ARM 64-bit)
Download the appropriate version of EBTCalc for Linux.
Extract the tarball (*.tar.gz) file that you downloaded to a folder.
Run the EBTCalc file.
Note: If you create a launcher to the app, you can use the icon in the resources folder.
Note: You may need to specify the --no-sandbox command line option. Ubuntu requires this setting. The --disable-gpu command line option may speed up the initial rendering on Linux systems.