The cdintf210.dll error indicates that you ran a 7.1.x update on a computer with 7.0x. The 7.1.x updates only work on computers with 7.1 installed.
Uninstall your current version of Final Draft 7 and run the full 7.1.3 installer. The step-by-step uninstall instructions are HERE and the 7.1.3 installer is HERE.
Windows: 2000, XP or Vista