How to Check the Version of C/Front
It is important to make sure that you have the correct version of C/Front for the version of Microsoft Dynamics NAV that you are running. To find out what version of C/Front you currently have installed, please follow this procedure:
Find the C/Front Program Files folder (i.e. "C:\Program Files\Microsoft Dynamics NAV\SDK\CFRONT" or "C:\Program Files\Microsoft Business Solutions-Navision\SDK\CFRONT").
Locate the file “cfront.dll” or “cfront.ocx”.
Right click the file.
5. Click the “Version” tab (Windows XP/Server 2003) or the "Details" (Windows Vista or later)
6. Note the “File Version:” or "Product Version" number