Patch 1.71

Added three new specs, Sage, Operative, and Mechanist.
Some bug fixes, and a change to unique RPG Growth monsters to prevent incompatibility with Stardust Lib.
Changelog and Credits tabs now function like the Lore tab, and are thus easier to read.

Update 1.7

Added 4 Specializations.
Updated MRE with Rylasasin's compatibility request.
Made some UI changes for better readability.

Patch 1.64

Compatibility with Saturnians and FFS thanks to Rylasasin.
Balance changes to Aether Tantos and Luxuria

Quick Fix 1.63-f

Rogue Specialization progress should no longer stop due to a lua error.

Update 1.63

Jeweler released.

Patch 1.62-f1

Made sure Elemental Overcharge removes Element Resistance when unequipping while active. If you were abusing this glitch, it will be fixed as soon as you begin to play on your character.

Not mentioned in in-game change-log: Skill Movement Bonuses no longer affect Spike Spheres.

Patch 1.62
Added Dark Templar and Technomancer, among other things.

Patch 1.61

Class Quests can now be properly finished when using SAILs with FU or Race Mods.
Ninja Techs got some improvements.
Smith Weapon Levels nerfed, but UI improved.
Some minor bug fixes.

See in-game change-log for more information.

Update 1.6

Changed Class Quests, improved Class Item and Weapon recipes.
Added new Enemy Types for use with Class Quests, as well as lore for each one.

Added new craftable Tungsten Wands.

Improved some old Class Techs (like Vanish Sphere and Controlled Hover),
Abilities (Soldier's One-Handed Bonus Damage),
and Weapons (Aether Tanto, Nova Staff).

Fixed some bugs and issues.

Added a toggle-able floating XP Bar.
Added a shortcut to open the Mysterious Book, as long as you have a Class Tech equipped. (Hold Shift and quickly triple-tap Crouch).

Improved True Understanding Skills to give a very small bonus when active.
Improved Tamer passive to only work on captured monsters.

Added compatibility with Equivalent Exchange.

Slightly changed Hunter's Cloak (now de-cloaks after doing damage to prevent invisible dagger spam).
Valkyrie lore now properly unlocks.

As always, check the in-game Changelog for more specifics (L tab in Mysterious Book).