The tweaker has still been working rather well on my end, barring the instability coming from Terraria itself. Hopefully the code issues get fixed at some point.
(I've even had the base game fail to launch a few times, so I know that it's not the tweaker. Hahaha!)
I just wanted to mention a trivial detail that was seemingly missed where the Permanent Buffs tweak will display buff ID 59 as being
Shadow Dodge. This was the Titanium Armor's effect prior to 1.4.0.1, but because the effect was moved to Hallowed Armor, it has a new icon and was renamed to
Holy Protection. It's extremely minor as the buff's functionality has remained the exact same.
Additionally, since permanently giving yourself Shadow Dodge / Holy Protection would just make you invulnerable, any user searching for such an effect would have probably just used the existing Invulnerability tweak instead, making this even easier to forget about.
Overall, it's just a very small thing you could fix if the code ever gets adjusted to become significantly more stable.
I'm still very fond of the tweak that eliminates biome spreading to this day. Being able to take as much time as I want in hardmode makes it less stressful. Thank you for all the work you've put into the tweaker!