for some reason sum is NOT cross version compatible. if you want to use the latest SUM you HAVE to use the latest 9.x or whatever. I just found this out the hard way..so if you are using SUM don't upgrade your utm's until sum is also available for the new utm version or you loose the functionality of SUM.
We are preparing to release the SUM 4.2 pretty soon! There will be a beta forum also available for it, so in case of issues and other useful information make sure to check it out. SUM 4.2 Beta Forum will be made visible as soon as the version is released.
@Sven: because UTM 9.2 introduces many features (for example Web Protection which looks completely different), it is not guaranteed that the changes are properly done with SUM 4.0. This is not recommended!
yes we are going to release a firmware up2date from SUM 4.1 to 4.2. We're currently testing the up2date for the SUM 4.2 beta. This upgrade to the beta version is set to be released early next week.