AICITSS not completed whether eligible to attempt Nov 2019 exams..

Before converting to new course, if you had appeared in the old course exam, then you should do it either before or after appearing in Final (New) course exam but in any case before applying for membership.

In case you did not appear in the old course exam before converting to new course, then you need to it before appearing in Final (New Course) exam.

https://resource.cdn.icai.org/48201faq_advanced_icitss.pdf
See Table-1 on Page-2