Have you tried a clean installation? Delete ideas.exe, software.ini and the dinput.dll in the plugin folder. Redownload the ideas.7z package and the Dinput plugin, decompress them in the appropriate folder.
In the past the site was modified to add a spam link but now is ok. My AVG 8.5 doesn't warning me. I've also checked the Source code of the page, nothing strange, only Ads from Google, Acekard and statcounter. Can you post the warning of your antivirus here? Thanks!