Conversion into direct entry system

I believe your registration itself has expired after 4 years i.e. around Jan/Feb 2017. You need to revalidate your registration by filling the form and paying a nominal fees around Rs. 400/-

Then you can apply for conversion to direct entry using this form:
https://www.icai.org/post.H T M L?post_id=9646

You can appear for exams immediately after registration as you have already appeared for the same after CPT. Hence, the waiting period of 9 month doesn't apply to you.

Further, as recommendation, you should complete IT course at your earliest to join the articleship.

Thank you very much for your assistance in this matter.