You can download a newer version (4.0.10.5) than the version just installed (4.0.1.1) from the download page.
Please download the most up to date version and install it. You do not have to uninstall the version you just installed.

If you always want to get the latest news about MB-Ruler, then just add yourself to the MB-Ruler mailing list and send a simple mail with the subject

"add to MB-Ruler Mailing list" to MB-Ruler@Markus-Bader.de

(just click on this link).

You will receive an email when new information are available.