Want to downgrade to 3.X but not sure how

Hello,

I recently updated to current version of the plugin, but I greatly prefer the sitemap.xml. format. It always updates and indexes quickly with Google so I don’t feel necessary to change.

After doing the update, that file isn’t current. On the support page it says: “For some reason, I don’t like the new format. Can I change to the old one?. There is not really a reason to not use the new format, but if you really don’t like it, you can use the 3.x version of the plugin!”

Question is, where do I find the 3.x version and how to install? And by downgrading will I be deindexed by Google/need to resubmit? Or If I did decide to go forward, would I also be de-indexed following these steps “There is still a sitemap.xml or sitemap.xml.gz file in your blog directory. Please delete them as no static files are used anymore or try to delete them automatically.”?

Please help as I get nervous having my sitemap stuck in limbo :-/.

Thanks!

https://wordpress.org/plugins/google-sitemap-generator/