Channel list lost after unproperly shutdown.

i would like to ask you for helo. ProgDVB 6.92 Proffesionall x86 version in 64bit W7. After unproperly shutdown of my computer i lost my last channel list. There is old channel list with one sat. position. I worked hard for customize my channel list through whole day and now the channel list is gone. Thats pity and i am really angry :) Please can somebody tell me what happen and am i able to change it back ?
Thank you.