IPTraf 3.0 is a major revision from IPTraf 2.7. The filter subsystem has been completely redesigned and as such, is incompatible with previous filter formats. Therefore old IPTraf filters can no longer be used. The installation procedure for IPTraf 3.0 will rename the filter list files but not delete them.
If you install a distribution package (e.g. RPM, dpkg), old filters may still appear in the filter selection list but the new IPTraf version will be unable to load them.