title: Model Sim - unable to add new files to a project
body: <p>I am trying to add files to a new Verilog project using Model Sim. When I create a new project, I am unable to see the option to add files to the project.</p>
  <p>In the project interface, when I select Add New files to the project, unable to see any pop up.</p>
  <p>OS: Windows 10 64-bit
  Software: ModelSim-Altera 10.1d (Quartus || 13.0)</p>
  <p>I have changed my Windows compatibility to Windows 7, as the software supports only windows 7.1 and windows 8.1.</p>
  <p>Please give me tips and if any other software is recommendable for windows 10 for Verilog, I welcome your advice.</p>