... configuration dialog. Also this dialog can be called using clock context menu.
Sources (v5) are hosted on GitHub: https://github.com/Kolcha/DigitalClock5
You can create your own skin! See this link for details: https://sourceforge.net/p/digitalclock4/wiki/How%20to%20create%20skin/
NOTE: do NOT download any .rar or .exe files marked as my software, these files are NOT made by me and I'm not responsible for their content