History Viewer allows you only to view the URL history, cookies, downloads, input history, top visited sites and so on. If you double-click the URL address, it will open it in your default browser. If the application opens its installation folder, it means that the URL address you clicked is no longer available. The software doesn't allow you to manage or delete the data. If you want to delete the data, click the Want to erase all the history above? Get Tracks Eraser Pro link and download and install the utility. Also, if your version of History Viewer doesn't work properly, I suggest you upgrade it.