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Our software products provide libraries of accurate engineering functions which are available through add-ins and calculators. The add-ins attach directly to Microsoft Excel, Lotus 1-2-3 and MathCad. They are used just like any of the built-in functions and require no macros or modules attached to the spreadsheets.

 What’s New

Order Software Products from our Website

You may now order software products directly from our website.  Go to the Order page
when you are ready to purchase.  You will find an order form from which you can select any quantity and combination
of single user licenses and multi-user licenses.  The order form will automatically include all quantity discounts available.
  When you submit your order, you will receive an e-mail confirming your order.  We will review your order and send you an invoice
along with a link to pay by credit card through a secure process. 
You may also pay be sending a check or by wire transfer.  Upon receipt of payment, we will send you a paid invoice along with your license documents and instructions.

New Mailing Address

We have a new mailing address: Techware Engineering
Applications, Inc., 1614-0 Union Valley Road, #194, West
Milford, NJ  07480.

New Installation Programs for Compatibility with Office 2013

WinSteam 4.0, @Air 4.0, @Gas 4.0 and
XLInterp 4.0 have been tested with Windows 8 and
Windows 10 and are
fully compatible. The Excel add-ins for these products have been
tested with Office 2013 and 2016 and are fully compatible with both
32-bit and 64-bit versions of Excel.  Previous versions of
these products are not compatible with Office 2013 or later.

We made a change to the installation programs for the 32-bit
versions of all of our 4.0 products to make it easier for users
to find the Excel add-ins.  The previous versions of all of
our 32-bit products placed the Excel add-ins in the Library
folder of the current version of Excel installed on your
computer.  The new release of the 32-bit installation
programs place the Excel add-in files in the corresponding
TechwareEng product folder.  This was done because the
Office Library folder is difficult to find under Office 2013.

More specific details regarding the installation of the
32-bit versions of our 4.0 products are provided in the
download and installation instructions for each product. 
No changes were made to any of the products’ files. 

New Release @Air 4.0

The download file for the 32-bit version of @Air 4.0
has been replaced  with a new release to fix a problem with
the unit set extras.  In the @Air add-in
for Excel, the user can add extra characters to the unit set
name in order to invoke specific changes to the functions such
as changing from a dry basis to a wet basis for certain
properties. In the previous release of the 32-bit version only,
these unit set extra characters were ignored.  The unit set
extras were available when the user entered unit sets on a
numerical basis instead of a character basis.  This release
fixes that problem.  We suggest that all users of the
32-bit version of @Air 4.0 download the new
version.  You should un-install the previous version of
@Air before installing this upgrade. You will have to re-enter the serial and
authorization numbers.

New Release of WinSteam 4.0

The download file for WinSteam 4.0 has been replaced with a
new release to fix a couple of minor problems.  The first
fixes the StmPHT function which was returning
an error value in certain areas of the critical region.  No
other functions were changed nor was the StmPHT
function code changed outside of the critical region.

A few customers were having problems getting the 64-bit
version of Excel 2010 to recognize the WinSteam
add-in.  This new release also fixes that problem. 
The designation for the new release version is 4.0.1.  You can
verify the version number by clicking the About button on the
DeskTop Steam Help menu.  The
StmVer function only returns the major and minor
version number and so the release number is not visible from
there.

All users of WinSteam 4.0 should download
and install the new release.  If you install it without
uninstalling the previous release, you will not have to re-enter
the serial and authorization numbers.

Compatibility with Microsoft Office 2010

Version 4.0 of WinSteam, @Air,
@Gas and XLInterp are
compatible with both 32-bit and 64-bit operating systems and
will work with 32-bit and 64-bit versions of Microsoft Excel
2010.  In Version 4.0, all help files have
been converted to compiled HTML format, which is compatible with
all recent versions of Windows.  WinSteam 4.0, @Air 4.0,
@Gas 4.0 and XLInterp 4.0
are now available.

Compatibility with Office 2007 and Earlier

The latest versions, WinSteam 4.0,
@Air 4.0,
@Gas 4.0 and XLInterp 4.0 are
compatible with Microsoft Office 2007, Office 2003 and Office
XP.  The Excel add-ins for Office 2007 and later are
different from the
add-ins for earlier versions of Office in that they support the
larger worksheet size.  The installation program for each
add-in will
detect which version of Office you have and install the proper
add-in automatically.  For all version 4.0 products, you will have to go
to the TechwareEng group on the Start Menu to launch Help.

Version 4.0 Pricing

The pricing for all version 4.0 products will be the same as
that for the previous version.  Upgrades from versions 3.0, 3.1 and
3.2 of WinSteam, @Air and
@Gas as well as versions 1.1 and 1.2 of
XLInterp are available for a price of $99.00
each.  Upgrades from older versions are available for
$149.00 each.   Check the
pricing schedule for details.

If you purchased WinSteam, @Air,
@Gas or XLInterp after October
31, 2011, you qualify for a free upgrade to version 4.0. 
Contact Techware for your upgrade. 
You will have to be issued a new serial number.

All pricing is based on downloading the software.  The software is
always available for download from our website whenever you need
it and you are assured of having the latest version.