Application crashes after upgrading to El Capitan system, how can I fix that?

As for your case, please help update the program to the latest version so that it will have a good compatibility with your current El Capitan system.

Please uninstall your current program completely from your computer and then download the latest version for reinstallation.

For iSkysoft iMedia Converter Deluxe for Mac, please download the latest version from here:

http://www.iskysoft.com/imedia-converter-deluxe-mac.html

For iSkysoft Video Converter for Mac, please download the latest version from here:

http://www.iskysoft.com/video-converter-mac.html