First - read the label of the product you used. If there are limits, it should tell you.
Second - if you are like me and most of us who threw away the jugs. Just remember to flush and sanitize before you use the RV. Write a bit sign and tape it over the sink so you don't forget.
The value of RV anti-freeze is not that it avoids freezing. It will freeze if the temps get cold enough. But it will NOT EXPAND as it freezes like water, thus will not damage the lines, valves and fixtures.
Personally, at the relatively cheap price compared to replacing broken valves and such - I'd flush it out and add new next winter.