We have a pretty large Robohelp project that we've recently upgraded to Rh2020.
This project in Rh2019 (.xpj), we had several files that we had "excluded from search". These files were not part of the TOC, nor were they linked from any of the normal "topic" files. We'd link to these files directly from the product UI. This was because we wanted these topics to be visible only to these special customers who have these very special features. This worked fine in Rh2019. When we generated the output in Rh2019, these files would make their way to the output folder automatically. These were not searchable, but were part of the output folder.
However, in Rh2020 this doesn't seem to work. The output folder completely ignores these files. They do not make their way into the output folder.
As part of our troubleshooting, we tried adding a link from one of the regular topic files to these hidden files, and then generated output. All the hidden files from this folder then made its way to the output folder. However, these files are now no longer "hidden" because it is linked from one of the public-facing topics.
Do we have a workaround for this? Looks like Rh2020 is forcing us to include all topics as part of the TOC, or link them from other topics. This overwrites the way we were using the "Exclude from Search" functionality.