back to factory settings

I recently set my computer back to factory settings....The reason is involved, but the end result is what I need help with. I have a file on my desktop with all apps removed after going back to factory settings. It is an external drive with bigfish games.. Does anyone know how to reinstall the lost apps with the games back to my computer.When I launch the game the message is bigfish manager no responding. I have tried reinstalling game manager and I get the same message..I got a message at one time asking me which app do I want to use. I tried internet explorer and nothing happened...I did get a message asking me which one I wanted to use and did I want to use it for every bigfish item.I can't get that message back..I know this is very specific to my problem but I'm at a loss. I am afraid of making matters worse. HELP please..

Have you tried going back to the official site and re-downloading the games you have paid for? Games for PC, Mobile, iPhone, iPad, Android, Mac & Online | Big Fish

thanks for a prompt response.. I have started reinstalling games. I have over 300 so it's a process. Going back to factory settings did help my initial problem but created another. Not too tech savy so I resorted to the only way I could think of. Won't be quick to do it again. And now I will create a backup file. I don't know if that would have saved me with this mistake.