Yup, it should be OK to run through. It is even possible to import that show file into the new strand offline editor, and you might be able to dump that file out ASCII through that.
It's contingency planning, in case a 300 coming in from Aus. has any issues. I have Showport and have twice prior, converted Strand 400 and 500 shows to Express, via the ACSII conversion, with general success (excepting parts).