change wording – remove "membership" from public face

Using this plugin for a (501)c non-profit. Board of Trustee tells me that we cannot offer or sell membership to “members” but instead can call them “patrons.”

They insist that the word “member” or “membership” be removed from all public-facing pages.

Can I modify the template files to do so and at the same time avoid complications during plugin updates?

Thanks

Bill