As you say, it seems to be outdated classes. In the version.txt file, I see that version 1.3 had the following information (see the full text for other migration information)
- replace monitor.defaultTimeout = nn, by
monitor.defaultRetryPolicy = new RetryPolicy(new RetryParameters(0,0,nn))
So, I'm thinking that you're aiming at a pre v1.3 utility but using a swc for a later version. In fact, the multicore swc only became available after release of 1.3.
As regards latest releases, note that the final release of StartupManager is 1.6.1. The new version, version 2.0, is called Loadup, released at the beginning of this week.