View Reports as Powerpoint not working

<p>I have installed the lastest version of BIRT on eclipse and can no longer view reports as powerpoint.   I can do pdf and word OK.  I'm using the Office 2013 version on Windows 10 and IE/Chrome browsers.   I get the file downloaded but powerpoint gets an error on opening.   Below is the URL and header of the powerpoint .ppt file that was downloaded.   Any suggestions?</p>
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<p><a data-ipb='nomediaparse' href='http://127.0.0.1:64194/viewer/preview?__report=\\public\it\ETT\BIRT\Reports%file+.rptdesign&amp;__format=pptx&amp;__svg=true&amp;__locale=en_US&amp;__timezone=CST&amp;__masterpage=true&amp;__rtl=false&amp;__cubememsize=10&amp;__resourceFolder=\\public\it\ETT\BIRT\Reports&amp;__asattachment=true&amp;__dpi=168&amp;__emitterid=org.eclipse.birt.report.engine.emitter.pptx&amp;-412053114'&gt;http://127.0.0.1:64194/viewer/preview?__report=\\public\it\ETT\BIRT\Reports%file+.rptdesign&amp;__format=pptx&amp;__svg=true&amp;__locale=en_US&amp;__timezone=CST&amp;__masterpage=true&amp;__rtl=false&amp;__cubememsize=10&amp;__resourceFolder=\\public\it\ETT\BIRT\Reports&amp;__asattachment=true&amp;__dpi=168&amp;__emitterid=org.eclipse.birt.report.engine.emitter.pptx&amp;-412053114&lt;/a&gt;&lt;/p&gt;
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<div>MIME-Version: 1.0<br>
Content-Type: multipart/related; boundary="___Actuate_Content_Boundary___"</div>
<div>--___Actuate_Content_Boundary___<br>
Content-Location: slide-show<br>
Content-Transfer-Encoding: quoted-printable<br>
Content-Type: text/html; charset="utf-8"</div>
<div><html<br>
xmlns=3D'<a data-ipb='nomediaparse' href='http://www.w3.org/TR/REC-html40''&gt;http://www.w3.org/TR/REC-html40'&lt;/a&gt;&lt;br&gt;
xmlns:o=3D'urn:schemas-microsoft-com:office:office'<br>
xmlns:p=3D'urn:schemas-microsoft-com:office:powerpoint'<br>
xmlns:v=3D'urn:schemas-microsoft-com:vml'<br>
></div>
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<p> </p>
<p>The emitters I am using are:</p>
<p>org.eclipse.birt.report.engine.emitter.ppt_4.6.0.v201606072122</p>
<p>org.eclipse.birt.report.engine.emitter.pptx_4.6.0.v201606072122</p>
<p> </p>