Firstly if you still have the crack wich contained the virus then you should install an antivirus software and search it. Maybe it will tell the exact name of the virus. Then maybe it will be easier to find a solution.
However i guess big companies who manage to decrypt a ransomware wont give you free solution.
Did the virus encrypt text files too? If yes then open one with notepad and check for any correct words. If you can find some then it might be possible to restore, but if not then they used some more professional way. Then you will have to find out what encrypt algorythm they were using and what key they were using which sounds impossible.
Next time download cracks only from sites which have many comments that says it works fine. They might use antivirus software so it is safer