Don't ever use "Super Boost" plugin.
Because that plugin deletes all spaces in the source codes which destroy all Js. Then your website becomes conflict free because your website becomes JavaScript free.
Once the "Super Boost" plugin is "unpublished", i am still seeing the conflict issues.
Then I figured out there are 2 jQuery libraries are loaded in your website. This is not okay.
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Your website is already loading 1 jQuery by Virtuemart Component, which is enough for everything. Loading any additional jQuery will fail all the jQuery dependence extensions.
An another thumb rule is; jQuery MUST BE LOADED before the JS files. Therefore that extra jQuery should be disabled through scLogin Module.
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Once this change is made, everything related to our VM Template starts working: "The Zoom Effect, the "register and checkout" button in the shopping cart page, load shiping rate button and the checkbox you talked about".. everything.
But this time the ScLogin Module stops working. You should contact to ScLogin module's developers and ask them:
"How to make the scLogin Module work without loading the jQuery library"
- because your website is already loading one.
Regards.
Support & Development