Block Select Mode can be overridden; if Block Select Mode is enabled, enabling Word Wrap automatically disables Block Select Mode until Word Wrap is disabled. The other way around, however, is different; if Word Wrap is enabled, Block Select Mode simply cannot be enabled.
I think this inconsistency must be resolved, Block Select Mode should be allowed to override Word Wrap in the same way Word Wrap is allowed to override Block Select Mode.
(Note: my plea is obviously nullified if the Textpad team somehow thinks Word Wrap is special and more 'worthy' than poor Block Select Mode
)