In AviSys, a data set is a group of files that are inextricably associated with each other in a relational manner. Deleting individual files, or mixing the files of one data set with others, is simply a guarantee of disaster. Do not attempt to make file changes, or "loan" parts of your data to others. Let AviSys do that by adding new data sets, below, or through Sighting Record Streaming.
Click on the File on the main menu bar. Note that the data set you named during installation is on the menu. If it’s checked, that means it’s the data set currently in use. You can add up to 15 data sets, each of which are complete new sets of AviSys data, as if you had installed AviSys 15 times. You switch to a data set by clicking it. You click Current Data Set = Preference to cause the current data set to be the one loaded each time you start AviSys.
When you select Add New Data Set, a new set of data files is extracted from the current data set, and copied into a new sub-directory (folder) which you name. The first time you load the data set, AviSys offers to “clear” the Sites, Cities, and Counties Places. If you wish to retain the Places scheme of the original data set, decline. The program then creates a new, empty Sighting File.
To delete a data set, use File Manager/Explorer to delete the data sub-directory (folder) and all its files when AviSys is not running. (AviSys will not start unless there is at least one complete data set available.)
Note: any sub-directory (folder) created under the base AviSys directory is considered a data set sub-directory. To replicate a data set, manually create a new sub-directory and copy a complete existing set of files to it. The next time you start AviSys, that data set will be available in the File menu.