Scrivener not open

Good morning.
I tried a long time ago Scrivener.
After a while I decided to buy it, but now when I try to open the program does not work. I removed the program. Then I used CCleaner and after I re-install Scrivener. But nothing to do.
What should I do?

There is a software to perfect clean a previous installation?

I repeat the action for three times and now Scrivener working very well.
Excuse me.