@Everyone Wurst 7.50.1 is now available. Download it here: https://www.wurstclient.net/updates/wurst-7-50-1/

Changelog
Fixed Block and BlockList settings (e.g. the X-Ray Ores list) silently removing modded blocks when you restart the game. (/d/1289, /d/1293)
As a result of the above fix, if you add a modded block to e.g. X-Ray Ores, then uninstall that mod and restart the game, the block will now stay there.
Block and BlockList settings are now generally less strict about which blocks are considered invalid when loading the settings.json file. When they do remove a block, they will now always log an error message telling you which block was removed and why.
Fixed Block and BlockList settings as well as the .setblock
/ .blocklist
commands not rejecting invalid blocks correctly.