Need help with Webp2GIF.exe.

I'm looking for a command line switch for WEBP2GIF.exe so that when an incoming webp file does not specify 'replace' or 'combine', that the default is set to "REPLACE" rather than the current default. The faulty conversions can usually be easily spotted by doing a side by side comparison with the original webp file as there is a distinct discoloration in the gif file when viewed with Windows File Explorer.