New features

There is now an official website for win-acme at https://pkisharp.github.io/win-acme/, built with GitHub pages right from the master branch. The website serve to make the tool more accessible to non-programmers, who might be unfamiliar with the GitHub jargon. Another reason to do this is to make it easier to evolve code and documentation simultaneously, including the benefits that having a version history etc. brings for future reference.
#1200 - Microsoft Windows DNS example script contributed by @Kolahzary

Enhancements

Many text labels have been added or fine-tuned to make them more clear, especially around the "full options" mode of setting up a new renewal.
Improved error handling to reduce log pollution by AutoFac containers, hiding the root causes
#1188 - the program will now report the health of its scheduled task at each startup. Idea by @Booster2ooo
Pre-validation for DNS plugins will now be done with a public server instead of the system server, which prevents issues for people with split zones. Also the program rotates through multiple servers if initial checks fail. Currently the default servers that are tried are Googles (8.8.8.8 and 8.8.4.4) and Cloudflare (1.1.1.1) but you can change these in settings.config

Fixed several issues related to making changes in IIS Manager while the program is running
#1186 - Import from 1.9.x was broken in version 2.0.9, reported by @kccsf
#1192 - the Route53 plugin didn't work in unattended mode IAM role - reported by @xenophonf
#1194 - When the client is unable to create an EC signer while registering with the ACME server, create an RSA signer instead, solves part of the issue described by @baffourt
#1195 - the CSR target plugin didn't work in interactive mode, reported by @leacho73
#1204 - the question "Try in default browser?" for --test runs of HTTP validation went missing, reported by @wlodek76
#928 - Support non-root zones for Azure DNS
Forked our own version of the command line parsing library to fix some long-standing bugs with (escaped) double quotes, e.g. for script arguments.