Includes next components:

Editor v0.3.1.5
Engine v0.2.2.4-alpha
Playable Calibration tool v2.1.0.1
PNG2GIFs v1.1.0
GIFs2PNG v1.0.5
LazyFixTool v2.0.0

Editor Changelog from 0.3.0.2 to 0.3.1.5

Fixed the small bug with missed up refreshing of item counters after flood-fill operation
New Design of classic events tool box
Fixed the dialog lockers
Middle mouse button with selected alone item now can copy settings of item too!
Added support to exit from hand-drag scroll mode with right mouse button
Added support of redefinition of some initial item properties
Fixed a crash in relation to closing the musicbox while fetching is in process
Fixed a bug in relation to desynced frames on exported images
With the updated SDL2_mixer_ext, it is now possible to have looped OGG files (vorbis tags LOOPSTART and LOOPEND with PCM-sample position are required (you can insert this via Audacity))
Fixed a small issue with unreseted NPC parameters on taking new NPC's to place
Added "tip of day" to bring attention to some useful features in the Editor.
Added tool which provides clean-up of garbage NPC's caused by SMBX bug (any climbabme NPC's such as vines are flooding SMBX)
Added config pack version notifier (if your config pack is outdated, you will be notified)
Better designed development console box
Fixed a bug which made crashing possible if the F5 keys were pressed too often.
Performance when editing big levels and world maps, has been immproved.
In flood-fill mode, BGOs are now colliding with other BGO's.
Added "Transform all Item-ID's in current section" menuitem
Added ability to transform music boxes.
Added multiselection for item selection dialog for "add" action in the custom counters editor.

Engine Changelog from 0.1.0 to 0.2.2.4

Physics are completely replaced with own coded physical engine
Working NPC-AI system with support NPC's coded in the Lua
Exits are works!
Kill effects [are not works perfect, need a lot of work, but there are works fine]
Added generators!
Player can climb on NPC-based climbable walls, not only on the BGO-based!
Fixed a lot of bugs
NPC's finally can be spawned from blocks where there are was included!
Added support of the layers and basic events! [layers: show, hide, toggle; message box; play SFX; trigger another event; autoscroll speed, changing of limit borders per section, toggling section background, toggling section music, other event actions are not implemented yet]. Working event triggers: block destroy, hit, empty-layer; NPC died, activated, empty layer [talk is not implemented yet!]
Fixed random crash caused by lua activation event when camera catched a corpse of NPC
Fixed slow performance caused by bad time delay function
Player finally can ride on NPC's heads [anyway, is not finished yet]
Basic Detectors API for NPC-AI which giving able to catch objects came to specific area
Fixed bug with super-fast game loop
Stompable NPC's are can be stomped!
Work with a speed-summing part of physical engine gives ability to stay and ride on the moving objects
Fixed imperfection with auto-closing of message box while "run" or "jump" key are holding
Episode/Level lists are no more freezing engine!
Working auto scrolling of sections has been implemented! (Unlike SMBX, autoscroll internally is an option of specific section which will works anyway, even you entered into this section from a side, you will get autoscrolling in this section)