In Toad DB2 6.2 there is no way to turn off the popup object details, however in our new 6.3 version - currently in beta - there is an option (via tools - options) to turn that off.
If the Editor - Tools - 'Show information popups for Objects' checkbox is unchecked - you will not get those popups.
Please try our Toad DB2 6.3 beta and let us know what you think - it is available at:
http://www.toadworld.com/products/toad-for-ibm-db2/toad_for_ibm_db2_beta_program/
Thanks