Update to lightroom 6.7

I downloaded the single app license and it updated to 6.14, but it doesn't auto-update to 6.7.

Are you aware that 6.14 comes after 6.7 in Adobe's version numbering?

The version numbering goes

6.7

6.8

6.9

6.10

6.11

6.12

6.13

6.14 (current)

You can find the original Base Installer, LR 6.0, and all the updates for LR 6 from here.

Download Photoshop Lightroom

The problem is I'm not sure if you can Down Grade without first removing LR 6.xx and then reinstalling the Base program then update to 6.7.

If all you want or all you can have installed, because of your OS version, is 6.7 then you need to Never run the Check For Updates link in the LR program.

Download only the base installed and the 6.7 update from the link above.