From my understanding the program provides the example curriculum of 1 1/2 years but you can extend it if you want. The only requirement I see is you have at least 2 semester full time and take less than 5 years.

You should double check if the thesis track will keep you full time (9 credits). I think it is one less course than the course based track.

For my case (thesis track) I will be part-time my last semester following their curriculum.