From now, it is possible to switch off serialization in the ProM ini file. Just add the following lines:
# # Indicate whether or not ProM should serialize the # workspace. If switched off, the last serialized # workspace will be loaded on each start DO_SERIALIZATION = false
If serialization is switched off, the last serialized workspace will be loaded on every start. This is helpful for debugging purposes.
Please keep in mind that it is necessary to test your work with serialization switched on.
seems like this flag is initially "false". At least it was set to false in my fresh installation of 6.2. I was quite surprised after I restarted ProM with an empty workspace. I looked in the ini, found this flag and changed it to "true".