Me too (also Australia) - been this way for the last day and a half or so.
Just received this email from GOG.
Hello,
Thank you for your message.
GOG GALAXY team is aware of the issue and currently working on a fix - unfortunately we don't have an ETA on it just yet.
Please note that the GOG GALAXY is not necessary to download and launch your games - you can still download them directly from the website.
Games already installed through GOG GALAXY can also be launched directly from the .exe file, located in game's main folder, without launching the app itself.
I apologize for the inconvenience.
Post edited October 21, 2020 by lennskii