What sort of licensing does this application have?

This is an excerpt from the licence that comes with the package.

Microsoft(R) PowerPoint(R) Viewer
END-USER LICENSE AGREEMENT FOR MICROSOFT SOFTWARE

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IMPORTANT-READ CAREFULLY: This Microsoft End-User License Agreement
("EULA") is a legal agreement between you (either an individual or a single
entity) and Microsoft Corporation for the Microsoft software accompanying
this EULA, which includes computer software and may include associated
media, printed materials, and "online" or electronic documentation
("SOFTWARE PRODUCT" or "SOFTWARE"). By exercising your rights to make and
use copies of the SOFTWARE PRODUCT, you agree to be bound by the terms of
this EULA. If you do not agree to the terms of this EULA, you may not use
the SOFTWARE PRODUCT.

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Software PRODUCT LICENSE

The SOFTWARE PRODUCT is protected by copyright laws and international
copyright treaties, as well as other intellectual property laws and
treaties. The SOFTWARE PRODUCT is licensed, not sold.

1. GRANT OF LICENSE. This EULA grants you the following rights:
- Installation and Use. You may install and use an unlimited number of
copies of the SOFTWARE PRODUCT.
- Reproduction and Distribution. You may reproduce and distribute an
unlimited number of copies of the SOFTWARE PRODUCT; provided that each
copy shall be a true and complete copy, including all copyright and
trademark notices, and shall be accompanied by a copy of this EULA. Copies
of the SOFTWARE PRODUCT may be distributed as a standalone product or
included with your own product.

2. DESCRIPTION OF OTHER RIGHTS AND LIMITATIONS.
- Limitations on Reverse Engineering, Decompilation, and Disassembly. You
may not reverse engineer, decompile, or disassemble the SOFTWARE PRODUCT,
except and only to the extent that such activity is expressly permitted by
applicable law notwithstanding this limitation.
- Separation of Components. The SOFTWARE PRODUCT is licensed as a single
product. Its component parts may not be separated for use on more than one
computer.
- Software Transfer. You may permanently transfer all of your rights under
this EULA, provided the recipient agrees to the terms of this EULA.
- Termination. Without prejudice to any other rights, Microsoft may
terminate this EULA if you fail to comply with the terms and conditions of
this EULA. In such event, you must destroy all copies of the SOFTWARE
PRODUCT and all of its component parts.

3. COPYRIGHT. All title and copyrights in and to the SOFTWARE PRODUCT
(including but not limited to any images, photographs, animations, video,
audio, music, text, and "applets" incorporated into the SOFTWARE PRODUCT),
the accompanying printed materials, and any copies of the SOFTWARE PRODUCT
are owned by Microsoft or its suppliers. The SOFTWARE PRODUCT is protected
by copyright laws and international treaty provisions. Therefore, you must
treat the SOFTWARE PRODUCT like any other copyrighted material.

4. U.S. GOVERNMENT RESTRICTED RIGHTS. The SOFTWARE PRODUCT and
documentation are provided with RESTRICTED RIGHTS. Use, duplication, or
disclosure by the Government is subject to restrictions as set forth in
subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer
Software clause at DFARS 252.227-7013 or subparagraphs (c)(1) and (2) of
the Commercial Computer Software-Restricted Rights at 48 CFR 52.227-19, as
applicable. Manufacturer is Microsoft Corporation/One Microsoft
Way/Redmond, WA 98052-6399.

Should you have any questions concerning this please contact the Microsoft subsidiary
serving your country, or write to: Microsoft Sales Information Center/One
Microsoft Way/Redmond, WA 98052-6399.

You need an agreement with Microsoft.

It clearly states:

"Should you have any questions concerning this please contact the Microsoft subsidiary
serving your country, or write to: Microsoft Sales Information Center/One
Microsoft Way/Redmond, WA 98052-6399."