You can do this from magento admin in 2 simple steps.
Step 1. Go to WeltPixel -> WeltPixel Debugger -> Extension Version. ( If you don't have this section in your Magento admin you are using an outdated version of WeltPixel extension).
Step 2. Check the modules that are not using latest version
Note: Latest extension version can be downloaded from My Downloadable Products section of your weltpixel.com account.
Step 3. How about extension Change Log?
Extension change-log can be found at the bottom of each extension product page on weltpixel.com.