Flamerobin 0.9.3 revision 2246 binary snapshots for Windows are available .
The new snapshot is with two changes:
1.Yet another attempt to properly treat nullability of procedure parameters (there are differences between Firebird versions, for nullable parameters rdb$null_flag need not be null, it may be 0)
see SF.net tracker item #3565746
2.And Show "Not Null" and "Default" columns for parameters in procedure Property pages
(needs better formatting, ideally column widths in Input and Output parameter tables would be equal)
Enjoy, and please be sure to report any bugs, regressions or suggestions on flamerobin-devel list.