I'm interested in launching my first Zen Cart site using a template from TemplateMonster.com. But the template I'm interested in using was developed for Zen Cart 1.3.6. The TemplateMonster folks don't guarantee that this template will function properly if I use Zen Cart 1.3.8. But I want to use PayPal Website Payments Pro. Are the TemplateMonster folks simply being cautious, or will I have real problems if I try and launch my 1.3.8 site using this template?