I deactivated, deleted the membership lite plugin. Will I have the same issues with full Membership

I previously posted Membership lite plugin problems, eventually unable to log into WP admin. I resolved that issue deleting the plugin in C panel. My question as follows?

I want and need the Membership plugin and can upgrade to full membership plugin. I have unchecked the box (anyone can register), are there any other precautions I should take before I upgrade?

Perhaps the WP log in and membership log in created the issues, I just want to be sure.

Your input is most appreciated. I look forward to your reply and moving forward. Many thanks!