Hi,
I guess your post refers to the ST25 Tag Editor utility of the ST25R3911B Discovery GUI for the ST25R3911B-DISCO.
For the support of ST25TVxxxKC devices, I would recommend to use the ST25PC-NFC application. It can be used with various ST discovery/evaluation boards (in particular ST25R3911B-DISCO) and it demonstrates RF communication with all ST25 tags (including ST25TVxxxKC devices). Easy access to registers of ST25TVxxxKC devices is also provided:

Rgds
BT
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