How to clean uninstall my free Comodo firewall?

Had some error in the first installation and now they disappeared. I nevertheless prefer to clean uninstall and re-install. Are there any special instructions except for the add/remove programs or the uninstall function of the firewall itself?
Tks

There is a .bat file that Ragwing created.

Full details here.
Full Removal of Comodo Firewall Pro 3 with SafeSurf Toolbar (If Regular Uninstall Method Fails)