In order from least preferred (method 1) to most preferred (method 4)

METHOD 1
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Use a batch renaming utility such as "Bulk Rename Utility" to convert
all file extensions to .txt, then open the resulting files normally.
This is the least preferred method.

METHOD 2
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With Jaybit edition 1.20/2.30 or later, use the "Export file to text"
button on the main screen to convert the file directly into usable
code. Using this method, the given code WILL work with ALL versions
of IncrediBots, open source or closed source, due to the fact that
the "Export file to text" button directly converts the contents of
compatible files to text, without any modification whatsoever.

METHOD 3
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Open files using Jaybit edition 1.20/2.30 or later. Note that replays
will not open in IncrediBots 2 using this method at the time of this
writing. Changing the file extensions to .ibre might fix this issue,
however doing so will prevent it from opening in IncrediBots 1.

METHOD 4
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Make the default program for .ibry and .ibrt files a simple text
editor. To do this on Windows, right-click any .ibry file, then
select the "Open With..." option. Scroll down to Notepad, Nptepad++,
etc. and select it. If it does not appear, use the "Browse..." button
to look for Notepad (usually it's located in "C:\Windows\notepad.exe"
or "C:\Windows\System32\notepad.exe"). Make sure "Always use the
selected program to open this kind of file" is checked, then click
"OK". The icon of .ibry files should change when you do this. From
now on, whenever you double click an .ibry file, Notepad should
conveniently open up. Repeat for .ibrt files. This is the most
preferred method because it allows you to open the files with a text
editor for opening with non-Jaybit IB versions, and allows you to
open it with the "Load" buttons for 1.20+/2.30+ Jaybit IB versions.