Due to the significant differences in Windows 8, the existing packet driver that tbbMeter uses will not work.
The application will run but no graphs of throughput are displayed. If you disable TCP/UDP monitoring tbbMeter should spring back into life.
Unfortunately some advanced features like splitting out LAN and WAN traffic will not operate in this degraded mode.
Once various other software projects have completed will concentrate on a fully Windows 8 compatible version, and we also want to develop a version for OSX users.