Foxit Reader opens File but Hangs up when FoxitReader.exe is Opened

It is a software which is used to read the pdf files. Now the problem is, when I open any pdf file through Foxit Reader, it opens that file normally, but when I run the Foxit Reader.exe it shows it is unable to open, and shows an app-crash message. What could be the possible reason behind this issue. I am using Windows 7 Home Basic 64 bit .
