This site promotes a dubious no-name registry cleaning application.

Considering a number of things, including:
* the lack of corporate and contact information;
* domain owner details (Whois record) are hidden by privacy protection service;

I can only advice to avoid this site/product. There is NO need for a legitimate business to hide its identity!

If you are looking for registry cleaner, some well-known good ones include, but are not limited to, the following (in no particular order):

RegSupreme/Jv16 Powertools http://www.macecraft.com/ (commercial)
CCleaner http://www.ccleaner.com/ (freeware)
RegSeeker http://www.hoverdesk.net/freeware.htm (freeware)
Advanced WindowsCare Personal http://www.iobit.com/advancedwindowscareper.html (freeware)
Comodo Registry Cleaner http://registry-cleaner.comodo.com/ (freeware)
Registry Mechanic http://www.pctools.com/registry-mechanic/ (commercial)

Phishing Scam Website! -
This site provides applications or services - Rogue / Fake -

Diverse Blocklisten warnen vor dem Besuch.
z.B.:
http://www.malwareurl.com/

Distribution of rogue or malicious content.

Scareware and/or other malware!