Wafo 25 throws errors on R2014b when executing the examples

[Maxi Miller]

When running the examples from wafo on matlab R2014b, I get the following errors:
Error using get
Cannot find 'get' method for event.EventData class.

Error in mkdeleteproxy>deletefun (line 48)
  delete(get(varargin{ix},'userdata'))

 
Error using delete
Error while evaluating Text DeleteFcn

Error using get
Cannot find 'get' method for event.EventData class.

Error in mkdeleteproxy>deletefun (line 48)
  delete(get(varargin{ix},'userdata'))

 
Error using mkdeleteproxy>deletefun (line 48)
Error while evaluating Text DeleteFcn

Error using get
Cannot find 'get' method for event.EventData class.

Error in mkdeleteproxy>deletefun (line 48)
  delete(get(varargin{ix},'userdata'))

 
Error using clo (line 48)
Error while evaluating Text DeleteFcn

What can I do to prevent that?