Starting last tuesday Google identified multiple OpenRCT2 downloads as potentially serving a virus. This was a false-positive, however, they did blacklist both the download mirror and website as dangerous websites. This mostly affects Chrome and Firefox users.
In an attempt to fasten up the appeal process I've made numerous changes to the API (which is used by the launcher) and the website itself. Mostly in the way downloads are offered. This most likely helped as the website is considered safe again, which is great.
However, some parts still need some work. This means that the launcher still has problems updating both releases and develop builds. On top of that the website itself currently only offers official releases.
I'm expecting to finish up work fixing all issues either this friday or saturday.
My apologies for the inconvenience!