Please send one of your files, with any additional information on the file format (which is very important if binary file) to tech@originlab.com so that we can take a look, and please mention this forum post in your e-mail.
I have the same problem. I need to open this type of file. I am using a file generated by a Nicolet Pro Oscilloscope. Can your software open this file. Thank you. D. Johnson david.o.johnson@orica.com
However, before you go through the trouble of finding the converter I suggest you try to import your WFT file directly to Origin. If WFT files are ASCII the Import Wizard should handle them fine. If they are binary then you need to know the file structure to help the IW read them.