We fixed the problem with the live demo, it is now working again and can be accessed at
http://www.IdealSoftware.com/activex/bin/vpectrl.htm.
The cabinet of the live demo is not signed, therefore you have to explicitly allow the execution of the live demo (two times) by clicking into the yellow security information area at the top of Internet Explorer. It may also be necessary to change the security settings of Internet Explorer and to allow to load unsigned ActiveX controls. Details, why we didn't sign - and how to sign - can be found in "vpectrl.htm", which is shipped with the VPE SDK installation.
Please note that the Internet Explorer is the only browser which supports the embedding of ActiveX Controls within websites. The live demo does only work when using Internet Explorer. For this reason we recommend to create PDF files with VPE on the server, and send the PDF files via HTTP to the clients, instead of using the ActiveX in browsers. With one exception: for intranet applications, the VPE ActiveX is a viable alternative.