Is it possible to apply to another college program in the same school after dropping out?

yes it's possible but you will have to go through the same process you did when you registered the first time. Unless your account is still active. Email your college about it though, they wont shut you out. Or you could call student services because i obviously dont know which school your talking about, but odds are its like every school and they just want more money so you should be fine. As long as you dropped out, and were not kicked out.