This tutorial explains how to get the Cryptosheets app running faster after experiencing a slowdown in performance.
The Windows version of office add-ins utilizes Internet Explorer 11 (yes...Internet Explorer) to run most of the functionality you utilize.
This was a bit of a bizarre choice (why not at least use Microsoft Edge) but for now we have to deal with that design decision.
How to reset Internet Explorer
Usually the slowdown in Cryptosheets is caused by a corruption of settings in Internet Explorer. Here is how to reset Internet Explorer:
Open Internet Explorer
Select the Tools button, and then select Internet options.
Select the Advanced tab, and then select Reset.
In the Reset Internet Explorer Settings dialog box, select Reset.
When Internet Explorer finishes applying default settings, select Close, and then select OK. Restart your PC to apply changes.