Cant open Request Editor

I'm having the same issue, spent hours setting up a full test suite for a Rest service, all working fine. I saved it and quit the app, now when I open the app/project I can no longer edit the requests in the main requests list or the tests. I can also no longer run any tests as they error immediately.

The error I'm seeing in the log, in all cases is this:

Mon Aug 18 16:16:46 BST 2014:ERROR:java.lang.IndexOutOfBoundsException: Index: 22, Size: 22
java.lang.IndexOutOfBoundsException: Index: 22, Size: 22
at java.util.ArrayList.rangeCheck(ArrayList.java:635)
at java.util.ArrayList.get(ArrayList.java:411)
at com.eviware.soapui.impl.rest.support.RestRequestParamsPropertyHolder.getPropertyAt(RestRequestParamsPropertyHolder.java:239)
at com.eviware.soapui.impl.rest.support.RestUtils.makeMatrixParameterString(RestUtils.java:280)
at com.eviware.soapui.impl.rest.support.RestUtils.makeSuffixParameterString(RestUtils.java:272)
at com.eviware.soapui.impl.rest.panels.request.ParametersField.<init>(ParametersField.java:65)
at com.eviware.soapui.impl.rest.panels.request.RestRequestDesktopPanel.initializeFields(RestRequestDesktopPanel.java:57)
at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel.init(AbstractHttpRequestDesktopPanel.java:177)
at com.eviware.soapui.impl.rest.panels.request.RestRequestDesktopPanel.init(RestRequestDesktopPanel.java:66)
at com.eviware.soapui.impl.rest.panels.request.RestRequestDesktopPanel.init(RestRequestDesktopPanel.java:36)
at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel.<init>(AbstractHttpRequestDesktopPanel.java:129)
at com.eviware.soapui.impl.support.panels.AbstractHttpXmlRequestDesktopPanel.<init>(AbstractHttpXmlRequestDesktopPanel.java:45)
at com.eviware.soapui.impl.rest.panels.request.AbstractRestRequestDesktopPanel.<init>(AbstractRestRequestDesktopPanel.java:61)
at com.eviware.soapui.impl.rest.panels.request.RestRequestDesktopPanel.<init>(RestRequestDesktopPanel.java:47)
at com.eviware.soapui.impl.rest.panels.request.RestRequestPanelBuilder.buildDesktopPanel(RestRequestPanelBuilder.java:44)
at com.eviware.soapui.impl.rest.panels.request.RestRequestPanelBuilder.buildDesktopPanel(RestRequestPanelBuilder.java:36)
at com.eviware.soapui.ui.desktop.standalone.StandaloneDesktop.showDesktopPanel(StandaloneDesktop.java:204)
at com.eviware.soapui.support.UISupport.showDesktopPanel(UISupport.java:587)
at com.eviware.soapui.support.UISupport.selectAndShow(UISupport.java:575)
at com.eviware.soapui.impl.wsdl.actions.support.ShowDesktopPanelAction.perform(ShowDesktopPanelAction.java:57)
at com.eviware.soapui.support.action.swing.SwingActionDelegate.actionPerformed(SwingActionDelegate.java:93)
at com.eviware.soapui.support.action.swing.DefaultActionList.performDefaultAction(DefaultActionList.java:111)
at com.eviware.soapui.ui.Navigator$TreeMouseListener$1.run(Navigator.java:412)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:733)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:703)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)

No idea if this is a result of a direct bug in the app or something that's corrupted the config file when it's being saved or opened but either way it's made the app unusable because I effectively can't save and reopen a project without it breaking.

I've also had the same error with the same project in the Pro version (5.1.1). This is the first Rest service project that I've used with SoapUI, I've not experienced any problems like this with the various Soap services I've used it with.