First of all, you need resource hacker (download here: Resource Hacker (http://angusj.com/resourcehacker/)), then open Tibia.exe in it, locate the version info resource, and change into this:
1 VERSIONINFO
FILEVERSION 7,2,0,0
PRODUCTVERSION 7,2,0,0
FILEOS 0x4
FILETYPE 0x1
{
BLOCK...