Self study or taking course for resit?

Dear tutor,

The last time I took my ACCA exams was more than one year ago with tuition courses, and I failed P7 with 48 in June 2014. I know the reason I fail was because I didn’t manage my time very well which I left a whole question no time to answer. Because I didn’t work for an accounting related job so I haven’t studied for ACCA for a long time since failed the exam.

I am thinking about resit this exam now and move to accounting area. Should I just study base on my old material or should I take some new courses for the update syllabus?

Thanks a lot