Absolutely. My PW5 was on 5.17.something, now I'm back on 5.14.1 and old UI with library page instead of home. Like this one, you can also switch to list mode:
https://techcrunch.com/wp-content/up...resize=800,600
https://blog.the-ebook-reader.com/wp...Screenshot.jpg
Install latest jailbreak, downgrade and see here:
https://www.reddit.com/r/kindle/comm...sions_on_5142/