A little update.
There is now a newer Ndless installer for classic TI-Nspire running OS 3.9.0.
It is based on more recent Ndless 4 installers and thus doesn't require an USB connection anymore.
You can now reinstall Ndless 3.9 in any situation directly from your own calculator !
Moreover, the previous 3.9.0 installer wasn't compatible with TI-Nspire TouchPad calculators.
If your TI-Nspire TouchPad was already running OS 3.9 then you had a huge problem, not being able to install Ndless, not being able to upgrade to 4.x, and not being able to easily downgrade to 3.6.
The newer installer is now fully compatible with all TI-Nspire ClickPad and TI-Nspire TouchPad calculators !
Download + source : https://github.com/ndless-nspire/Ndless/releases/tag/v4.4
There is now a newer Ndless installer for classic TI-Nspire running OS 3.9.0.
It is based on more recent Ndless 4 installers and thus doesn't require an USB connection anymore.
You can now reinstall Ndless 3.9 in any situation directly from your own calculator !
Moreover, the previous 3.9.0 installer wasn't compatible with TI-Nspire TouchPad calculators.
If your TI-Nspire TouchPad was already running OS 3.9 then you had a huge problem, not being able to install Ndless, not being able to upgrade to 4.x, and not being able to easily downgrade to 3.6.
The newer installer is now fully compatible with all TI-Nspire ClickPad and TI-Nspire TouchPad calculators !
Download + source : https://github.com/ndless-nspire/Ndless/releases/tag/v4.4