Recommended: Java 8u152 installed. Minimum: Java 8u40 installed.

Changelog

1.8.2

Hotfix for issue with buffer component where setting a label causes a NullPointerException
Hotfix for issue with memory editor for both RAM and ROM components where pasting 16 or more values causes it to skip a column every 16th value
Improve error message window to include “Save and Exit”

Significant performance and memory usage improvements
Holding CTRL will keep a component selected after placing it
Circuit file generation is now deterministic
Fix subcircuit pin count mismatch errors
Fix display of Output pin, where it used to be printed as Input pin
Fix saving ROM contents after being broken in 1.8.0
(Breaking change) Fix subcircuit pin ordering on the east and west side by sorting by Y instead of X

Revamp ROM/RAM component look: now showing the current address and value
Revamp ROM/RAM memory editor: no need to double click to start typing, no need to hit enter to commit, full multi-cell copy/paste support
Huge improvement and bug-fixes to wire behavior when moving components and with undo/redo
Add RandomGenerator component
Add copy/cut/paste to context menu in circuit editor
Display missing label names in certain components
Add All Files option in Load File dialog
Fixed bug with gates where downsizing the number of inputs kept the extra Negate options

Add Probe component, which lets you observe values on wires without resorting to output pins
Improve behavior multi-component selection when holding down control by disabling drag-less wire creation when control is held down
Copy doesn’t do anything when nothing is selected instead of emptying the clipboard
Other minor bugs fixed

Squashed tunnel bugs: now short-circuits should propagate properly across them and tunnels should work properly
Added comparison type to Comparator: now you can do both 2’s complement and unsigned comparison
Draw magnifying glass to subcircuit components when hovering over them to indicate ability to view internal state
Officially making a file format change supporting library paths
Other minor bugs fixed

Big thanks to Cem Gokmen for helping with the Mac issues and Austin Adams for gradle-ifying the repo!
Now supporting both Java 8 and 9 - thanks to Austin Adams for figuring out how to create a multi-release Jar.
Huge rendering performance improvements, especially for Mac
Fixed keyboard shortcut issue on Mac
Use system menu bar on Mac instead of the in-app bar
Added an update checker that notifies you when there is a new version
Fixed a bug with subcircuits where it pushed values through output pins, causing seemingly un-explainable short circuits.
Improved behavior of tab selection when moving them or deleting them, especially with undo/redo
Many minor bug fixes and improvements

Fixed exceptions being thrown when using Tunnels
Now you don’t have hit enter to update a text or value property, someone complained that it was annoying. The component is automatically updated when you unfocus from the text input.
Multi-bit wires with a floating bit (X) now show up as dark blue instead of black
Button now has directions

Improved behavior when dragging components to also delete wires whenever they overlap existing ones
Huge performance increases with subcircuits and tunnels. Bad designs will still be very slow to run the autograder in.
Now showing Help dialog on first run.

Added creation of new wires when dragging components. This allows maintaining existing connections when dragging components to new locations.
Hold CTRL before beginning the drag to disable this.
Fixed file load issue where an error was thrown if the folder doesn’t exist anymore.
Fixed issues with dragging + keyboard shortcuts
Fixed an undo bug when updating components