A: It is possible that this issue is happening because the Windows 8.1 machine was not rebooted after the PSQL client installation. As a result, the environmental variable "PATH" has not been updated to include the PSQL BIN folder. In that situation, when Elliott starts up it cannot locate the PSQL components. To verify if that is the case, bring up a command prompt and type "PATH" to see if your current path includes the Pervasive PSQL\bin folder. See the example screen below.
If you don't see the path for the PSQL\bin folder, then reboot your workstation and see if that resolves your problem.