After much testing, It appears to be an issue with the way the Date macro prints out.
Here are two workaround I've come up with for the time being. (there may be more though)
1. Unchecking "Show Save As dialog" inside the printer allows the macro to complete successfully.
2. Simply not including the Date Macro in the file name.
I know these are not the fixes you are looking for, but in the meantime it should help you.
Rest assured it is coming, the Devs are on it right now
Willy Van Nuffel is not the only one with this problem. I started the thread "XChange Lite 'Save Options' not working" https://forum.tracker-software.com/viewtopic.php?f=39&t=31068&p=125155#p125155
and Willy sent me to check this thread also.
I have PDF-XChange 4.0 Lite, which came with my purchased copy of Editor. I run this on Windows 7 Pro (64 bit) SP1. I make all my changes in Settings->Control Panel->Devices and Printers.
I tried all the suggestions noted here, as well as a few others. In my case, the ONLY problem is caused by the [Date] macro. I have attached a screen shot which shows my current settings. Unlike what you found, checking the 'Show Save As...' option not only worked, but was necessary. If I leave it unchecked, NO file is created! Whether the differences with what you found are due to differences between my 4.0 and the latest 7.+ version, only your teams knows that.
Also, [DocPath] does not seem to work correctly. You can see in the attached that I have listed my complete path, and it appears, from the example that the file name should start with C:, but only 'Documents' [actually 'My Documents' ] appears in the .pdf file name. The .pdf that is created IS placed in the correct Download directory.
So please put some emphasis on this issue.