What shall I do if my program crash/freeze when I open it?

You can follow the steps below:

1. Go to installation path. You can right-click the shortcut of the program, and select Properties>Find Target or Open File Location to open the installation path.
2. Delete the Log folder under the installation path.
3. Download this new installation package from the link below to install it. When you download it, you can close any anti-virus programs temporarily. 
Download URL: http://download.iskysoft.com/video-converter-ultimate-win_full670.exe

4. Connect network, and start the program. You can wait 3-4 minutes for its refreshing and opening. 

In case it doesn't work, please send us the new log folder.
(1) Right-click the shortcut of the program, and select Properties>Find Target or Open File Location to open the installation path.
(2) Find a folder named "Log" and send all the files in the folder to us.