Designer creates a dump file that has information on the state of the software when it crashed. If you look in your installation BIN folder (for 1.4 it is typically c:\Do-more\Designer1_4\Bin), and look for all the dump files - they have extension *.dmp.
The file names have the form
DmDesigner__version__date/time.dmp like DmDesigner__1_4_3__20151130_183100.dmp.
OR
CSMainDm__version__date/time.dmp
If you can email any/all of them to "support at hosteng.com" (you see how to make it a valid email address in your To: field, don't want junk-email-address-sniffers to find it). Feel free to compress them or send them separately if you have any limitations.
If possible, please include any information on what you were doing when the crash occurred. Even better, if you can duplicate a crash scenario and describe it in detail, this would be very helpful.
Thank you!!