I already hold a uk bike and car license, so I had to watch the video, traffic light, brakes test! Also not forgetting the proof of residence from immigration, so basically had to do what I did last time. I assume if you already have the old Thai license, then you would just do the same.
I had same problem, had to go through the same process as getting it the first time! Fortunately having the knowledge, I did it my self, costing about 400baht for both car and motorcycle!