Office 2013 and 2016 users can try these tips to speed up EstimatorXpress:

When Microsoft released Office 2013 they made significant changes from previous versions of Microsoft Office - primarily to support tablets.  With these came some new features which have shown themselves to slow down Excel, and subsequently EstimatorXpress.  There is also an incompatibility between Excel and certain graphics drivers in Windows 10, and this causes Excel to crash often; you may well have seen this whilst running EstimatorXpress. Once you apply these tweaks you should find that EstimatorXpress (and also Excel) runs a lot quicker and you should see far fewer instances of Excel stopping working.

Turn off Windows animations

Press the Windows logo key and the U key (then let go) to open the Ease of Access Center.

Click on Use the computer without a display. (This might seem odd but it's the quickest way to the setting you are going to change.)

Tick Turn off all unnecessary animations (when possible).

Click OK.

Tweak Excel options

Open Excel and click File in the top-left corner of the window, then click on Options (second up from the bottom of the menu on the left side)

Click Advanced on the left side of the Excel Options window. If ticked, then untick Automatically Flash Fill.

Then scroll down to the Display section of Advanced settings and tick Disable hardware graphics acceleration.

Note: DO NOT apply the following graphics tweak if you are using a 4k monitor.  Excel requires the graphics acceleration to drive very high resolution monitors

Click OK.

Close Excel and then open EstimatorXpress, you should see an increase in speed when opening estimates, workbooks etc.