I have a fresh installation of Joomla and SEBLOD - my existing installation is joomla 2.5.16 and SEBLOD 3.1.15 . Now I have installed Joomla 3.3.3 and SEBLOD 3.3.7. What I'm trying to do is to transfer all the SEBLOD items to the new version .... but it is like impossible .... Please help me out here...
I suggest you rather go a different route - first delete every extension you don't need on new site, but Seblod, then upgrade Seblod and Joomla to the latest one.
In this particular case, I would suggest a simple backup/clone of the existing site. Then update the clone to J! 2.5.xx latest. Then Seblod. Check site and other extensions for J!30 comaptibility. Update J!25 with core function to latest 3.3.x
PS: Why fiddle around with export/import and other ways?