Quick question for those familiar with the durametric software

I recently downloaded durametric version 6 and I've used it twice to check on faults codes. Engine codes are clean.

Hypothetically speaking if the engine misfires due to old or worn out spark plugs would that be logged and saved so that the next time I run the durametric these would show up as registered fault codes under the engine menu? if so how long are these fault codes saved? do they remain on the log indefinitely until cleared?

thanks in advance
Art