Pretty much fixes only. If you're playing the PC 0.20 version, you can simply download the 0.20 to 0.21 7mb file and extract it to your main game directory (where the exe file is located), make sure to overwrite any files.

Changelog:

• Adult Toadpole shop now properly restocks store each day
• cure poison: player will no longer take damage from poison after curing it. In addition, the potion also reduces damage from poison (used to simply increase resistance to it)
• added regeneration stats to character inventory
• added name tooltips to glossary
• fixed missing scenes in witcher laptop replay. This will need improving in the future
• fixed Asara spawning in the library when she's supposed to be in the dorms
• sewer dungeon: early on when Asara is still in library at evening, selecting a map and canceling before doing any combat would take the player to the dorms. This is now fixed
• fixed crashes/errors saying 'currentplayer' has no name attribute. This was caused by skipping, and in some cases the text under combatlog not changing properly
• fixed missing sfx error on conjured skeletons
• minor improvements to Willow story4 dialogue
• improved enemy counterattack on touch spells
• fixed a rare error that may have popped up during damage calculation for monsters
• casting titus exposus during arena event will no longer cause issues with music (flies sound effect)
• changed locations positioning on map for better clarity
• improved character icons positioning on map for better clarity
• fixed Helen animation in repeat
• equipping an item for the first time could cause an error if this is the first item ever the player used