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Plantronics Plugin for Cisco Jabber: Cannot Correctly Upgrade Plugin to Version 1.6 from Version 1.5

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I cannot upgrade to Cisco Jabber version 1.6 with version 1.5 installed on my PC.


If version 1.5 of the Cisco Jabber plugin is already installed, the attempt to upgrade to version to 1.6 will be unsuccessful.  However, version 1.6 will install properly if the previous version is completely uninstalled prior to installation.  The next version of the Jabber plugin (1.7) will allow upgrades from both versions 1.5 and 1.6.