In order to run VIDA, a valid license provided by OpenEye must be present
on the installed computer. OpenEye license files are typically named
oe_license.txt and most OpenEye software products (including VIDA)
expect to find that license file in the location specified by the
OE_LICENSE environment variable or in the directory specified by the
OE_DIR environment variable.
If neither of the above environment variables are defined on the computer, VIDA will prompt the user at run time to locate a valid license file. If a valid license file is specified, VIDA will remember the location of that file and will not prompt again until that license expires or is removed.