It's a short log so I have put the text in the message 
Any ideas?? Thanks in advance!
Program Version: 5.0b SR-2 (5.0.2.0743)
Mac OS Version: 10.7.4
Architecture: x86_64
Model: MacPro5,1
Processor count: 16
Time: 2013-04-02 14:28:01 +01:00 (2013-04-02T13:28:01Z)
Installed memory: 14,336 MB
Install path: /Applications/Logos.app/Contents/MacOS/lib/Logos.dll
Free install space: 28,354 MB
Data path: /Users/mark/Library/Application Support/Logos4/Data/q9y0s0xs.q9y
Free disk space: 28,354 MB
Temp path: /var/folders/__/8rw0b89j39s89zbhn946v9900000gn/T/
Free temp space: 28,354 MB
Swap usage: total = 64.00M used = 0.00M free = 64.00M
Error ID: 7686
Error detail: TargetInvocationException: Exception has been thrown by the target of an invocation.
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> Libronix.Utility.Threading.AsyncWorkException: Unhandled exception in asynchronous work. ---> Libronix.Utility.Data.DatabaseVersionException: The database schema (9) is newer than the latest schema recognized by this code (8). The database cannot be opened.
at Libronix.Utility.Data.LocalFileDatabaseUtility.VerifySchemaVersion (Int64 nDatabaseSchemaVersion, Int64 nCurrentSchemaVersion) [0x00000] in <filename unknown>:0
at Libronix.Utility.Data.LocalFileDatabaseUtility.UpgradeDatabase[String] (IConnector conn, Int32 nCurrentSchemaVersion, System.Func`2 fnGetInfo, System.Func`3 fnUpgrade, System.Action`1 fnBeforeUpgrade, System.Action`1 fnOnValidSchema) [0x00000] in <filename unknown>:0
at Libronix.Utility.Data.LocalFileDatabase.UpgradeDatabase[String] (IConnector conn, Int32 nCurrentSchemaVersion, System.Func`2 fnGetInfo, System.Func`3 fnUpgrade, System.Action`1 fnBeforeUpgrade, System.Action`1 fnOnValidSchema) [0x00000] in <filename unknown>:0
at Libronix.DigitalLibrary.ResourceCollectionManager+<ResourceCollectionManager>c__AnonStoreyC5.<>m__28B (IConnector conn) [0x00000] in <filename unknown>:0
at Libronix.Utility.Data.LocalFileDatabase..ctor (System.String strPath, System.Func`2 fnCreateConnection, System.Func`2 fnValidateDatabase, System.Action`1 fnCreateDatabase) [0x00000] in <filename unknown>:0
--- End of inner exception stack trace ---
at Libronix.Utility.Windows.Threading.DispatcherAsyncWorker+<Start>c__AnonStoreyE+<Start>c__AnonStoreyF.<>m__1C () [0x00000] in <filename unknown>:0
at Libronix.Utility.Windows.DispatcherUtility+<BeginInvoke>c__AnonStoreyA.<>m__16 (System.Object ) [0x00000] in <filename unknown>:0
at (wrapper managed-to-native) System.Reflection.MonoMethod:InternalInvoke (System.Reflection.MonoMethod,object,object[],System.Exception&)
at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
--- End of inner exception stack trace ---
at System.Reflection.MonoMethod.Invoke (object,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo) <0x0010f>
at System.Reflection.MethodBase.Invoke (object,object[]) <0x00022>
at System.Delegate.DynamicInvokeImpl (object[]) <0x00213>
at System.MulticastDelegate.DynamicInvokeImpl (object[]) <0x00033>
at System.Delegate.DynamicInvoke (object[]) <0x00016>
at System.Windows.Threading.DispatcherOperation.InvokeOperation () <0x0003b>
at System.Windows.Threading.Dispatcher.InvokeQueuedDispatcherOperations () <0x0010f>
at (wrapper native-to-managed) System.Windows.Threading.Dispatcher.InvokeQueuedDispatcherOperations () <0x00057>