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After upgrade from Version 1.0.2 to 1.0.4 (and then to 1.0.5) my ModulManager crashes with following Message:
Fatal error: Call to a member function on a non-object in c:\inetpub\wwwroot\ff_helpsen_102\admin\moduleinterface.php on line 117
Whats wrong?

I'm not sure of the official "rule" on upgrading, but I find that if I upgrade in incremental steps I have less problems.  For example, upgrade .2 to .3 to .4 and then to the latest release 1.0.5.

I tried skipping once, and I had to start over with a new install. 

""Back-up!!""