You need toturn on Linux on the Chromebook to access the Linux environment via the terminal app.
Then, follow the following steps to install Mind+.
Check the processor architecture
Use the following command to check the processor architecture in the terminal:
uname -m
The output will be similar to "i686", "x86_64" or "armv7":
i686 (or similar) - 32-bit Intel/AMD processor (common in older computers).
x86_64 (or similar) - 64-bit Intel/AMD processors (modern laptops, desktops, and most Chromebooks).
armv7 (or higher) - ARM processor. (Mobile phones, tablets, 2nd and 3rd generation Raspberry Pis running Ubuntu Mate, and some Chromebooks. Most are 32-bit now)
Use the following command in the terminal to install it (Replace ***** with the file name of the installation package):
sudo dpkg -i *****.debsudo apt-get -f install
After installed, you can start the Mind+ app in the Chromebook launcher: