Project examples files that are provided by plugins using a plugin URL (e.g. platform:/plugin/plugin.id/...) fail to be refreshed. The only workaround is to delete the cached file from the workspace's .metadata.

The following logic in ProjectUtils.getProjectExamplesFile() is incorrect:

if (urlModified == 0) {
    if (file.exists()) {
        return file;
    }
}

as '0' is the same as IRemoteFileInfo.NO_LAST_MODIFIED. If urlModified == IRemoteFileInfo.NO_LAST_MODIFIED, the file should always be updated.