It is not in the sub-folders. It is at the bottom of the root. You have to scroll to it. You will have some "fun".
Basically, you need to scroll down to find the primo.exe file. There are no scroll bars. You have to use your finger to "drag" the list upwards. Unfortunately, until you get the hang of it, you will end up in other folders and have to try again. Try and pick where there is nothing (easier said than done) and then drag your finger (while pressing on the screen) up the screen. Usually one drag should be enough, but you might have to do it again. Then pick the primo.exe file and all should be OK.
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