AFAIK, there is no software that will include the memo/blob field in an export for ANY platform.. the reason is simple.. the software wouldn't know what the content of the blob field is, so how would it export it?
as an alternative, you can scan the paradox table and extract the blob info to a file, using the key values of each record to create the naming convention of the file.. then you can insert the file in your new data system, using a similar reversed scan logic..