Hi and welcome to the communities.
install_nonexclusive_no_dpf.exe - this should work.
all of our month end and year end backups are in backup exec, is there a way to import these into Veeam?
Unfortunately, we do not support backups produces by third part software. In theory, I'd keep the trial version on this software somewhere close to these backup files. Whenever you need a recovery you could use an evaluation version.