you can download the older version of the app from internet. I suspect there is not many site or none at all providing app files to wp7. The os is absolute, it has been years since it was dismantled like wp 8/8.1 . You have to switch to a newer phone in terms of software i mean. You lumia 710 might only be a few months old and a year off unused but overtime the software is left unusable.
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