The message reads:
The file you are trying to open (.name of file....) is in a different format than specified by the file extension. Verify that the file is not corrupt and is from a trusted source before opening the file.
You can then attempt to open the file
It seems that you can only convert PDF pages that are pure tables - if there is any text apart from labels the file program will not convert.
The program neccessitates you knowing what pages the tables are situated on and that they aren't password protected.
This program is very linited and too expensive for what it does.