I already set the Maximum Memory for the agent (4GB) because VWR is a 32-bit software and it can only utilize that limited memory. Try to divide the search and reducing the number of results. Or if you badly need it, you can use Content Grabber scraper. It is built in 64-bit system and it can use more than 4GB or unlimited memory, depending on the capacity of your machine. You can download a trial and test it or you can request a free agent demo.
In "more" link template, I set the XPath to ignore the More result button when it disappears from the page using this, //DIV[@class='oax_pointer icons-furtherResults oax_marg_bottom_30 oax-list-further-btn'][@style!="display: none;"]/SPAN and so if it is not stopped, try to run it with view browser and see what causing the problem. Most likely, when the agent clicks the More result button, the website did not load the results and make the button frozen
I reselect the page area to capture the links you want, see attached,