I have a series of Java projects created with Intellij 2017.3 and am trying to reopen them with IntelliJ 2018. So far I am unsuccessful - what was a properly working project in 2017 opens without a "configuration" (though there was a valid configuration in 2017) and the project file tree is shown with a yellow background
I've also tried to 'import' the project and create from existing sources, but the former apparently only works for projects created with external tools (e.g. Eclipse, etc.) and from 'existing sources' which likewise does not create a complete project.
I've not been successful finding any help on Google or the JetBrains website.
Somehow this doesn't seem right. Could it be a defect?