Glad you got it going. Now you just have to remember how you did it and write it down. You will probably have the same problem when you connect an external instrument and when you change settings from one program to another. I usually go through a similar trial and error method often, looking at where everything is and how things work.
Enjoy making music.
BTW, there is a Samplitude Pro forum and Kraznet has done more than 150 tutorials on YouTube for it.