https://youtube.com/watch?v=UGZKKXTNcE8
The first Windows build was broken, if you got that please check again--the links have been updated to a hotfix.
windows
Qt5 zip: https://github.com/hydrusnetwork/hydrus/releases/download/v500a/Hydrus.Network.500a.-.Windows.Qt5.-.Extract.only.zip
Qt6 zip: https://github.com/hydrusnetwork/hydrus/releases/download/v500a/Hydrus.Network.500a.-.Windows.Qt6.-.Extract.only.zip
Qt6 exe: https://github.com/hydrusnetwork/hydrus/releases/download/v500a/Hydrus.Network.500a.-.Windows.Qt6.-.Installer.exe
macOS
Qt5 app: https://github.com/hydrusnetwork/hydrus/releases/download/v500/Hydrus.Network.500.-.macOS.Qt5.-.App.dmg
Qt6 app: https://github.com/hydrusnetwork/hydrus/releases/download/v500/Hydrus.Network.500.-.macOS.Qt6.-.App.dmg
linux
Qt5 tar.gz: https://github.com/hydrusnetwork/hydrus/releases/download/v500/Hydrus.Network.500.-.Linux.Qt5.-.Executable.tar.gz
Qt6 tar.gz: https://github.com/hydrusnetwork/hydrus/releases/download/v500/Hydrus.Network.500.-.Linux.Qt6.-.Executable.tar.gz
I had a good week-and-a-bit returning to normal hydrus schedule after my personal issues. There are some important bug fixes, particularly for windows crashes, and some neat updates to tag search logic.
Those who use the Windows Qt5 release will want to perform a 'Clean Install' this week: https://hydrusnetwork.github.io/hydrus/getting_started_installing.html#clean_installs
crashes and bugs
I messed up the new mpv version in v499. My golden rule is to never put out bleeding-edge library updates, but without thinking I gave Windows users a dll from late August. This caused instability for a variety of installs, but thanks to some great reports and user testing, we were able to figure out the problem and solution. I regret I wasn't able to roll out an official fix until now, but I will remember this issue for future--never fold in the latest build of anything.
There are two fixes here. Windows Qt6 users simply get a more stable mpv-2.dll today. You don't have to do anything special, just install as normal and your hydrus should be more stable. Windows Qt5 users will be rolling back to mpv-1.dll, so if you are a Qt5 user who updated to v499, you should perform a 'Clean Install', as here: https://hydrusnetwork.github.io/hydrus/getting_started_installing.html#clean_installs . Just follow the guide and you should be good again, but let me know if you have any trouble!
I also fixed a critical issue that was affecting a couple of users with damaged similar file search trees. If you have had 'similar file tree rebalancing' maintenance that seemed to go on forever before locking up your client, this is now fixed. Some related simple errors when the maintenance routine ran into a damaged or looped tree are also fixed.
The Client API now handles disconnects more gracefully. Some logspam is cleared up, and very slow file and tag searches via API now cancel on disconnect just like in the UI (e.g. when you type a new character in autocomplete tag search, it'll cancel the older slower search and start a newer faster one). If you run a busy Hydrus Companion or another Client API application that really hammers your client, let me know how you get on.