Firstly you need to access your purchased products area, download and install the latest release of the plugin.

Then you have to change the default base size font to avoid this and match the original font size of your site.

See the parameter in the screenshot attached.

After changed that value clear your browser cache/cookies and eventually click on the reset font button to refresh.
Change the value till you get closer to the original font size of your website.

If you disable the font size it won't affect resizing but you have to use the latest version of the plugin downloading it with your license.