I'm not sure to understand your question, but the user guide may be what you need: http://ndlessly.wordpress.com/ndless-user-guide/

Well if you don't describe what goes wrong we can't help you.

use the maintenance menu and you can reinstall the OS. That should get your calc working again, but it will completely remove ndless.

This is basically the end-all restart, but it shouldn't remove your documents.

to get there, hold Doc+Enter+EE while rebooting. When the menu comes up, press T, then 1. After that, use tilp or ti-connect to install OS 3.0 when it asks you to.

hello, i have another problem with my ti cx
my ti will restart and in the middle of the reboot it shows "system error" and a low battery sign
and after that my ti closes (it just stops at the middle of the reboot bar and closes) (so it not a reboot loop)
i cant get to the diagnostics menu and the maintenance menu says "replace batteries and try again Press any key to turn off"
Please help me!

The cx comes with just a rechargable battery, and can't use AAAs.  Iirc it's still removable tho, albeit under a screwed-on cover?

Try booting it while it's plugged in, so it uses the usb as a power source.

ive tried pluging it up with USB and booting it
doesnt work:(

accidentally delete the ndless directory  :'( , in my calculator (TInSpireCAS with click pad )restarts indefinitely, as I can recover the system

[MENU] + C: Option (Delete All)
I thought that refers to erase all the current folder 


solved

http://ndlessly.wordpress.com/ndless-troubleshooting/

The TI-Nspire falls into a reboot loop

Reboot the TI-Nspire, by unplugging the USB cable, then removing and putting back a battery on classic TI-Nspire or by pressing the reset button on TI-Nspire CX.
Enter the maintenance menu by turning it on while holding the following keys until half (1/2) the progress bar:
with the ClickPad keypad: [Home]+[Enter]+[P] then[ON]
with the TouchPad keypad or the CX: Doc+Enter+EE then ON
If the maintenance menu displays the message “Replace the battery and try again“, see below “The TI-Nspire CX falls into a reboot loop and ran out of battery”.
Select ’2′ to uninstall the current OS. Reinstall it when asked to.

Next time make sure to never delete the file ndless_resources.tns as long as Ndless is installed. To uninstall Ndless,  ndless_resources.tns  should be opened first from the Documents screen, then deleted.

For those who have any contact with TexasInstruments Calculators , add an option to lock folders accidental erasure