I've been working on this problem as well for about a week. I have a Wacom Intuos 3 running on Windows 10 with PSE 14.
I'm not sure if my problem is different or not but from the limited information available out there I'd guess there's some kind of issue with the way Windows 10 interacts with Photoshop.
For me, I am able to use Paint Tool SAI with appropriate pen pressure (the buttons are super small on my 4k monitor and it has other mapping glitches, otherwise I would give up on PS and just use that instead). But for PSE 14 I have to hold the right click button in order to draw with pen pressure, or else turn off Use Windows Ink and have no pen pressure at all.
I have even gone through the steps on this page under the regedit section to try to turn off right click press and hold, but they were already disabled.
Many people have made reference to the solution in js80520066's post (this one), but this isn't a fix for all Adobe Photoshop products. I also have PSE 14 and this folder does not exist.
Adobe, can you please provide the file location of where to put PSUserConfig.txt?
I'm worried that PSE might not be configurable in the same way and that's why a solution hasn't been posted for any other kind of Photoshop product yet...