When to use VXDIAG JLR SDD Online and Offline Patch?

There are 2 patch files in the folder, which one should i use with VXDIAG VCX SE JLR, online or offline patch?

Offline patch:
SDD is offline version in default, the offline patch is required during software installation.

Online patch:
If you have an online account from JLR to perform online programming, the online patch installation is also required.  Install online patch before login online account.

Free download JLR SDD Offline and Online Patch for vcx nano or vcx se JLR: