Brother E850TKW User Manual page 183

How to Update P-touch Software
e
Select the [Language] settings, select the check box next to the firmware you want to update to, and
then click [Transfer].
Important
Do not turn the P-touch off or disconnect the cable during data transfer.
f
Check the content to be updated, and then click [Start] to begin the update.
The firmware update begins.
Important
Do not turn the P-touch off or disconnect the cable during the update process.
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