weaver-extreme.4.4.8.zip is the basic free theme, not the Plus Plugin.
If you have the Plus plugin Already installed, Then I don’t understand what you are trying to do, you do not need to reinstall anything. Renewing the subscription will make the installed plugin automatically check for update when some are available
If you need to update to the latest Version of the theme, you can you that from WordPress.org from your dashboard.
Your Dashboard > update would tell you if you need to update the theme, and let you do it from here.