when installing the plugin stops working the primary site

Good afternoon. When installing the plugin page transitions do not work the product catalog. The plugin is used to move from onovnom slider on the home page http://vashatehnika.by/, if you click on the slider the transition to the product and the external resource is working properly , but if you go through the menu to product the product page gives a 404 http: / /vashatehnika.by/tovar/rihters-26-econom/. If you remove all the plug starts to work , when re- installing the plugin is repeated.
The main theme Travelify of version 3.0.1 is still used plug WooCommerce 2.4.10

https://wordpress.org/plugins/page-links-to/