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Serialiation of ExplorerManager is not backward compatible with its postfcs version. The manager must be able to read (or at least consume and ignore) the previous serialization format otherwise we will not be able to read project files from previous version.
I changed the serialVersionUID so that it can be made compatible later. But it will require some effort, hopefully this will make it into the build at some point but not immediately. The format is substantially different now and not trivial to convert.
Jarda says it is now fixed in boston branch; he will merge onto trunk as well. Lightly tested only.
verified, closed