What do you mean? The mod replaces all the handling, so uninstalling should revert it to how it was before you installed it - unless you didn't uninstall it properly, and given the issues you have, this wouldn't surprise me... because I don't think it got installed properly. Or it's buggy, it was written originally for SMF years ago and I haven't had time to review how it works to make sure it works again on current SMF.