BLC

I created a series of drawings with title blocks using Vectorworks 2018 but they need to be compatible with v2017. I converted the files using file>export and while they open in v2017, the fields in the title blocks are no longer editable. I have no issues editing the title blocks in the 2018 version of the files, only when converted to v2017. Does anyone know how to make the title blocks work properly when converted from v2018 to v2017?