Hi Joey,
In the plugin’s settings please configure the following options:
General > Guests > Do nothing but block guests from purchasing products beyond the limits
General > Block guests from buying products > Block Method > According to limit options
General > Block guests from buying products > Add to Cart text > Enable the two options: Change add to cart button text from blocked products and Change add to cart button text from blocked variations
You can also try and enable the Hide products blocked from guest users option.
Please let me know if you continue having trouble with this.