turning off export of some channels

I've had some issues with this, maybe I'm doing something wrong: I have some channels that have "export" set to yes, so that they'll show up in an excel file when I export data. But when I take a channel that was already set to yes, and change it to "no", the new setting doesn't get saved. Need some guidance here please.

Hi,

I've tried reproducing the issue on my PC, but the channels get exported correctly even when I switch some of them off. Since there are a ton of variables that could be causing this problem for you, it would be very helpful if you could upload some of the files in which you can see the bug. I would appreciate the DEWESoft data file, the exported Excel file and a screenshot of your export options that don't export correctly. You can upload all of these files to our private forum (up to 2GB), where only DEWESoft's staff will be able to see them.