You no need remove OS Simple Membership,
Best way before update Joomla, if you update OrdaSoft Joomla membership
to last version.
Below you may see how activate and update our product:
And because you will can't undo update Joomla operation. Please do full site backup. With that you will not lost something important
If you would like any information or you have some errors, please
do not hesitate to contact us.
P.S. Please do site backup 2 times per month