Before update make sure you take your database backup and script backup from server so in case if anything goes wrong you can restore it.

ONLY RUN If you're upgrading your script from version 1.2 else it may break your application.

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Important Note:

• Image conversion only require if you upgrading from version 1.2
• As this update contain a major change for image optimizations. So after update the script you need to run the image conversion also.
• As you click on Run image conversion make sure your system is completly up.
• What this conversion does actually it will take your product image -> image1 and image2 and convert it to thumbnails and hover thumbnails. As your app have large no of product images it will take time according to it.
• For Shared hosting servers when you run the script genrally you will see the error after sometime Internal Server 500 or Server Request time out because your script may have large no of products but server have low bandwidth.
  On this condition just reload the page and submit the confirmation. repeat this until you don't see the Complete Button.