When you attempt to run more than one instance of one of the applications listed at the bottom of this article, the first instance runs but the second does not. No error message is displayed.
The most likely cause is that your software license is setup for one user. Each instance of an application counts as a user. When you attempt to run a second instance, the software is unable to find a free user "slot" so it closes.
Contact Solatech to purchase additional licenses.
This behavior is by design.