Just download that file and run it to install v10.00. It will install alongside any existing Global Mapper version, so you don't have to worry about losing what you're currently working on to evaluate it.

Numerous significant enhancements and bug fixes have been made to Global
Mapper for this release. The most significant changes are described below:

- Added support for importing ESRI personal geodatabase (MDB) files.
- Added support for importing and exporting BigTIFF files.
- Added more control over placement of labels for point features. Now when
choosing the font to use for point features, you can also choose where to
place the label for the point relative to the point location. An automatic
setting will try different locations to try and make the label fit.
- Added support for selecting/changing the layer that features are in when
editing existing features and creating new ones with the Digitizer Tool.
- Added KML/KMZ Super Overlay Support! This allows working with huge data
sets in Google Earth. The option to automatically grid the data on the
KML/KMZ export dialog enables this behavior.
- Added support for creating new feature coordinates based on
distance/bearing and/or COGO values from a start location using the
Digitizer Tool.
- Added option on the Gridding tab for exports to grid to the currently
selected area features. This will create a separate export file for each
selected area feature. Naming can be done using the display labels or an
attribute of the selected area feature(s).
- Added options when editing multiple features to rename attributes and also
to copy the values of one attribute to a different attribute.
- Added new Coordinate Convertor option under the Tools menu to allow easily
converting a coordinate between any two supported projections/datums/units.
- Added ability to Search Vector Data dialog to limit your search to the
existing search results. This effectively allows you to query on multiple
attributes/values.
- Added a large collection of new available line styles to use when
rendering line features or area feature borders.
- Added option to crop a loaded raster layer to the currently selected area
feature to the Cropping tab of the Raster Options dialog accessible from the
Overlay Control Center.
- Added support for exporting loaded vector data to the MapInfo TAB/MAP
format.
- Added support for exporting loaded 3D line and point data to the SEGP1
format.
- Made automatic collar cropping work for BSB marine charts.

All of the other numerous changes are listed in the What's New document that
is displayed during installation.

Pricing for Global Mapper v10.00 is $299 US for a new single license, $269
US per license for 2-19 licenses, and $229 US per license for 20 or more
licenses. Users with licenses for Global Mapper v9.xx can purchase an
upgrade to v10.00 for only $99 US per license. Site license pricing is also
available on request. As always, upgrades and new licenses can be purchased
from the Purchase page at http://www.globalmapper.com.