Usually there is no need to install a flash player to view a flash presentation in a website as browsers altready have support for them. However if the flash needs some advanced features then the website will prompt for downloading the required version.

In your case you may try to uninstall the software and then try to open the URL to view the demo. If it doesnot works you may download the latest version and get certain other information from this link

http://www.adobe.com/cfusion/knowledgebase/index.cfm?id=tn_15511

If nothing works then you can try using a diffrent browser (eg Firefox or Opera if you are using IE).