The Witcher 3 has been updated to version 1.20 on Steam, Origin, and GOG. Unfortunately, the new update will break all existing mods; and you won't be able to re-enable them unless the author updates it to support the new version.
This seems to be happening more and more with games as of late; especially with big patch revisions and additions of DLC. While the list of improvements that patch 1.20 brings is welcome, breaking mods is something that should ideally be avoided and causes a massive inconvenience to both mod authors and players alike.
Although it is expected most mod authors will update their mods to support 1.20, there may be modders who do not bother to update their work or may simply not have the time to do so.
Hopefully this won't be repeated in any further patches to The Witcher 3. While you wait for your favorite mods to get patched, here is the changelog for patch 1.20;
[list][*]Adds book titled 'A Miraculous Guide to Gwent' which displays number of gwent cards missing from player's base-game collection and information on where to find them, thus facilitating completion of achievement titled Collect 'Em All. Tome in question can be obtained either from gwent playing scholar in Prologue or from merchant near St. Gregory's Bridge in Gildorf district of Novigrad.
[*]Adds option to display herb names above available interactions.
[*]Adds option in Options/Gameplay to enable enemy level upscaling. If foes are too easy to defeat due to level difference, upscaling will render them a challenge. Change will not affect experience point gain, loot, or quest rewards. Option can be enabled or disabled at any time, even during combat (however, Vitality/Essence of foes is then fully restored).
[*]Adds option in Options/Gameplay to disable automatic drawing and sheathing of sword.
[*]Increases incidence of, and thus chances of finding, several monster-based ingredients required for crafting high level alchemy formulae.
[*]Improves Player Statistics panel, adding maneuverable Geralt model. Improves visuals in panel for better readability.
[*]Adds new functionality to books and scrolls. When first collected, they can be read immediately using single button without need of navigating to Inventory panel. All found but not yet read books and scrolls are stored in Quest Items and Other categories. Once read, books and scrolls can be sold as their content is saved in Books section of Glossary.
[*]Improves overall visuals in Character Development panel.
[*]Improves Inventory whereby items are divided into additional subcategories within their grids: weapons and armor; oils, potions and bombs; quest items and others; food and equestrian gear; crafting and alchemy. Additionally, introduces redesign of tooltips enabling their resizing with single button. Also, item comparison is easier than ever given addition of summary of changes in stats.
[*]Improves Inventory navigation when using gamepad. Slots are divided into sections and right stick can be used to jump between them.
[*]Improves Crafting panel in merchant shops. Adds option to purchase missing diagram components directly from Crafting panel when talking to merchant, as well as clearer descriptions and option to resize item descriptions.
[*]Introduces redesign of Repair panel in merchant shops. Adds single button enabling players to repair all equipped items.
[*]Improves Remove Upgrade panel in merchant shops.
[*]Improves Quick Access Menu whereby it can be accessed in one of two modes, with action either paused or slowed depending on button used.
[*]Adds functionality whereby crossbow bolts can be switched via Quick Access Menu rather than being equipped from Inventory.
[*]Adds counter for bombs and crossbow bolts to Quick Access Menu.
[*]Improves region maps by adding pin filtering, more intuitive quest tracking, and a region overview for faster navigation.
[*]Adds three new custom pins allowing players to mark areas for future reference.
[*]Improves Adrenaline Bar which better displays number of stored Adrenaline Points and their status.
[*]Improves display and behavior of Buffs, displayed in more intuitive manner showing time left, strength percentage, stacks, charges, or permanence where applicable. Buff icons now blink for approx. 10 seconds before expiration. For improved visibility, names and exact expiration times for all effects are only visible when Quick Access menu is active.
[*]Changes icons for decoctions, rendering them recognizable at first glance.
[*]Changes icons for oils, rendering them recognizable at first glance.
[*]Changes gwent card icons in shops, rendering factions recognizable at first glance.
[*]Changes icons for mutagens.
[*]Adds feature whereby equipment exceeding player character level can be previewed on character.
[*]Improves sorting in Journal whereby active quest tab is always open and tracked quest is at top of quest list.
[*]Improves quest item visuals so that Hearts of Stone and Blood and Wine quest items are now tagged with blue and red exclamation points, respectively.[/list]