ReadyAPI (SoapUI Pro) and SoapUI (free) on same PC

I have ReadyAPI (SoapUI Pro) on my PC. Some members of my team have SoapUI (free version) on theirs. Oftentimes, I need to switch to SoapUI free to mimic their environment. To accomplish this, I setup a workspace for ReadyAPI (readyapi_workspace) and another, separate workspace for SoapUI (soapui_workspace). However, whenever I boot either program, it uses the settings of the other. i.e., if I: 1) open SoapUI, 2) switch workspace to soapui_workspace, 3) open ReadyAPI -- the workspace in ReadyAPI will be the soapui_workspace. Then if I 4) switch ReadyAPI to readyapi_workspace the next time I close/open SoapUI, the workspace will be the readyapi_workspace in SoapUI. Whatever you do in one affects the other. The entire purpose of workspaces in these Eclipse environments is to avoid this.

Is there a way to make the two programs completely independent and ignorant of each other so that changing one does not affect the other, specifically the default workspace?