QtCDB2 is new rewritten software for Coincidence Doppler Broadenning of Positron Annihilation line measurement. Instead of old QtCDB, this version doesnt need external trigger chain. Software is based on Qt and Qwt libraries. Adlink PCI-9820 or other Adlink wd-dask based DAQ is needed to run binaries. HpGe Preamplifier gain 500mV/MeV is needed to correct work.