When you upgrade a project created with RoboHelp Classic to the reimagined version (2019 release or 2020 release), a new project folder is created. The Classic project remains as is.
Here’s what you must perform if some files are missing:
If you upgrade a project from the reimagined 2019 release of RoboHelp, the project folder gets modified. Before upgrading, take a backup of the project folder. Once the project is upgraded, we recommend not using the project in the previous version. Doing so produces a warning message.
After upgrading the project, check for broken or unresolved links, or any changes to files or topics.
Also, ensure that all RoboHelp authors are on the same update.