I have been on the new trimble site looking for a download but can find the old version. I purchased a pro license back in 2011.I am on a new machine and no longer have the downloaded installer I used to install Pro 8 back then. 
When I use my license on the latest version of pro it takes me to an upgrade page. I don’t want to upgrade (essentially purchasing the software again!).
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Latest Version:
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Requirements:
Mac OS X (Intel, PPC)
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Author / Product:
Adobe Systems Inc / Adobe Acrobat Reader DC for Mac
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Old Versions:
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Filename:
AdbeRdr1014_en_US.dmg
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MD5 Checksum:
3d7d7a4a3ef90277f90247d7360e955b
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About: Adobe Acrobat Reader DC software is the free global standard for reliably viewing, printing, and commenting on PDF documents. And now, it's connected to the Adobe Document Cloud − making it easier than ever to work across computers and mobile devices. Supported DRM (Digital Rights Management): Adobe® RMSDK 9.1 (ePub and PDF) Download and Installation Instructions. To ensure that no other program interferes with the installation, save all work and close all other programs. Download the ReaderInstaller.dmg file to a temporary or download directory (please note this directory for reference).