This version contains only a fix to a security bug in inc/app/webservices.php. Users installing playSMS 0.9.7 or 0.9.7.1 are encouraged to upgrade their installation as soon as possible. playSMS version prior to 0.9.7 are not affected.
A quick workaround to fix the bug is by removing inc/app/webservices.php immediately. See this for detail.
You may get playSMS 0.9.7.2 from our download page.
playsms.org 
I am using previous version of playsms, now I want to replace with new one but I am getting difficulty on that Please help me for installing this new version.
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