fix settings handling

for this a common workspace is being created. To allow for multiple
instances the work space is being unlocked as soon as the application is
initialized

com.minres.scviewer.e4.product/scviewer.product

@@ -11,6 +11,8 @@
       <programArgs>-clearPersistedState
       </programArgs>
       <vmArgs>-Xmx2G
+-Dosgi.instance.area=@user.home/.scviewer
+-Dosgi.instance.area.default=@user.home/.scviewer
       </vmArgs>
       <vmArgsMac>-XstartOnFirstThread -Dorg.eclipse.swt.internal.carbon.smallFonts
       </vmArgsMac>
@@ -18,6 +20,7 @@
 
    <windowImages/>
 
+
    <launcher name="scviewer">
       <linux icon="icons/SCViewer_512x512.xpm"/>
       <macosx icon="icons/SCViewer.icns"/>
@@ -142,4 +145,11 @@
       <plugin id="org.eclipse.equinox.event" autoStart="true" startLevel="2" />
    </configurations>
 
+   <preferencesInfo>
+      <targetfile overwrite="false"/>
+   </preferencesInfo>
+
+   <cssInfo>
+   </cssInfo>
+
 </product>