Although the mouse scroll wheel works well in NoteTab for the majority of users, a few have reported problems – sometimes after simply updating the mouse driver. We’ve never been able to reproduce any of the reported issues and therefore don’t know what is the source of the problem. A quick search on the Internet shows that there are many reports of malfunctioning scroll wheels with other Windows applications, so this is not an issue limited to NoteTab.
Installing the free third-party WizMouse utility usually solves scroll wheel issues.