At this point it should be possible to tune on a MUX manually. And then invoke DVB PSI/SI scanning -> Current MUX.
Still pending are the features involving unattended tuning of multiple frequencies.
This includes features such as DVB-T/C MUX finder to create list of MUXes.
It also includes multiple DVB PSI/SI scanning -> DVB-C/T MUX scanning. This feature itself depends on list of MUXes.
You can download Behold TV versions from here if you want to give it a try http://dvbse.com/grIyM6Xq/beta/dvbstreamexplorer4FreeX64.msi and http://dvbse.com/grIyM6Xq/beta/dvbstreamexplorer4ProX64.msi.
Some Behold TV devices support multiple antenna inputs. Make sure to select the correct one where applicable.
After launching DVBStreamExplorer the first time open Source -> settings.
Set 'Tuning lock delay' value to 1000 (ms).
If your Behold TV device supports multiple antenna inputs select the applicable one here.