The problem with some users trying to run NeoMC or XenoMC seems to rely on the Windows Kernel. I personally took some time to code a MC but the problem is not in the code. In my computer NeoMC used to work as well as XenoMC but after sometime it just stopped. If none of those MC applications work for you a little bit of research will give you 2 different solutions for this.
Do It Yourself!
You can do it manually
Use Process Explorer and do what all MCs do programmatically.
You should do this:
- Show Lower Pane
- Search for the application in the list
- Find the Mutex in the lower pane and kill it with right click
If you don't mind taking some risks you can edit Tibia.exe
Use a hex editor like this one
You should know that there is no risk so far actually but you may not do it the right way
You should do this:
- Make a backup of Tibia.exe
- Search hex string: FF 00 75 40 68
- Change the highlighted 75 to EB
- Save the changes and open as many clients as you want
If you want to save the trouble just download the modified executable file from my signature and scan it with your favorite Antivirus
