Dear James, Desire for career advancement is natural for everyone. Since the court has acquitted you, the case should not have a bearing on your career. Therefore, you may go ahead and start searching for a better opportunity. Your selection will be based on your knowledge or skill sets that you possess rather than litigation in the past against you. Be careful not to mention the litigation to the interviewer.
If you are working in an IT company, then you should be grateful to your existing employer. Despite the criminal case against you, your employer allowed you to continue to work. "Nobody is guilty till it is proved" sounds good only on paper. In all practical aspects, employers remove employees if there is a criminal case against them. However, in your case, your employer appears to be different. Therefore, graciousness demands continuation in current employment and not to quit when the purpose is served. Please do not ignore this flip side.
All the best!
Regards, Dinesh Divekar