This release includes the following addition and bug fixes:
- Added: Automatic check for Simple DNS Plus software updates (with Options dialog checkbox to disable).
- Fixed: With the new DNS0X20 option enabled, incoming error responses with no q-section would be ignored. In combination with the EDNS0 option, this caused problems resolving domain names hosted on older DNS servers that do not understand EDNS0 and do not echo the request's q-section in the format-error response to an EDNS0 request.
- Fixed: DNS0X20 fallback (another go with new random port and query id) for DNS servers that do not echo query name letter casing (rare) not happening.
- Fixed: Empty POST request to HTTP API would cause program crash.
We recommend that all users who are using Simple DNS Plus v. 5.3 as a resolver update to this build.