There are two ways to open project files (Local file or Cloud Storage). The buttons to access each of these options are in the top File many option tab. Pressing either of these buttons will load their respective dialog windows.
Loading a local file is for loading files from the hard drive on your PC or network. The Open File dialog will default to the first tab, which is for recent files. Recent files are the most recent projects that you have opened. The files will continually shift as new files are opened. This is for the convenience of loading your favorite project files. Other tabs are available, such as "File System", which allows navigating through the file system. The default location of "File System" will be the ARC default project location. The remaining tabs are categories for various robot types.
The Synthiam Cloud provides storage on the internet of your projects, which are also backed up daily. Every time the project is saved to the cloud, a revision history is saved as well. There are filter options on the left of the open file dialog to locate specific files.
Cloud Revision History
Files saved to the cloud with the same filename will maintain revision history. This allows you to load a project version throughout the lifetime of the project changes. Locate your file in the cloud dialog and press Version History to view the history.