This plugin only registers the new WooCommerce tabs, but the design is always site specific, determined by WooCommerce, your WordPress Theme and your own site design. The tab design is not the job of this plugin as it is different for every site.
I looked at your site, for example you can change the current css design setting (opspectraining1.png) with one of the CSS codes below, where the tabs are not as wide (opspectraining2.png). (This can be refined, your site designer can help with this.)
Here are some css codes to try:
#top div div.product .woocommerce-tabs ul.tabs li a {
white-space: initial;
}
#top div div.product .woocommerce-tabs ul.tabs li a {
white-space: initial !important;
}
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