Some users may have noticed that the Fastspring version of MobileSheets for Windows 10 was listed as unavailable over the last week or so. The reason for this is that the certificate that I use to digitally sign the app (which is required for Microsoft to allow installation of the application) expired and I had to get a new one which was taking much longer than anticipated. A new certificate has finally been received from Comodo, but there is a new problem: Comodo changed some of the certificate information slightly, so Microsoft thinks that the publisher’s identity has changed, and it will not allow MobileSheets to be updated. If you are running version 2.4.2 or lower of MobileSheets for Windows 10 that was purchased off the Fastspring store, you must follow the instructions listed in the forum post here in order to update to version 2.4.3.
I apologize for any inconvenience this may cause users. I did not anticipate the certificate change causing these kinds of issues. Feel free to contact me on the forums or at firstname.lastname@example.org if you have any questions about this.