Version 3.4-b3

New features:

• Implemented file redirections of the echo command (see here)
• Added support for new InvalidateChannel command allowing plugins to cancel already queued codes and files

Bug fixes:

• Resolved race condition for M0/M1 which could cause stop.g to be executed instead of cancel.g
• Fixed an exception that could occur when codes were cancelled and their result was combined
• Under certain conditions paused prints could not be cancelled properly