Firstly, congratulations for such a useful tool, this is the first time I send you a ticket.
I get errors when I try to upgrade my projects (.fbp) from version 3.2.3 beta to any newer version. Concretely, when I convert them to version 3.3.0 (the immediately newer version available) I get these errors (I attached an image too):
The file does not exist. File: [...]\wxFormBuilder\plugings\common\xml\forms.phpcode stringutils.cpp@221
The property named "position" of class "wxStaticText" is not supported by this version of wxFormBuilder. If your projects file was just converted from an older version, then [...]