I have made analysis as to why it is recognized as a virus.
I've sent the instalation file to virus
http://www.virustotal.com/
And they perform the check with many antivirus software.
Two scanners produced alerts:
F-Secure 8.0.14332.0 2008.09.24 Downloader.Win32.SwiftCleaner.d
Kaspersky 7.0.0.125 2008.09.24 not-a-virus
ownloader.Win32.SwiftCleaner.d
Description of this alert I have found is:
A program that downloads files to the local computer that may represent security risk
The pokerazor is doing updates by downloading new version of program from internet and running it.
So i think it is enough to believe it is false positive