Fix FoxitReader and update to 6.2.0.0429

-Fixed unattended installation
-Since unattended installation no longer works in the standard
 installer, switched to enterprise installer
-Upgraded from 6.0.10.1213 to 6.2.0.0429
Merge pull request #48 from sherbang/master

Fix FoxitReader and update to 6.2.0.0429