I am told that eM Client had an update a few days ago, since when I have not been able to open it at all. Is this a common problem?
I can’t address the “common problem” question as I have never had eMC update without me initiating it.
If you are comfortable executing these steps, give this a try:
(1) Delete any installation files you have downloaded.
(2) Uninstall eM Client, making sure not to delete your database directory when asked. This will ensure your settings and data remain in place.
(3) If it exists, delete C:\Program Files (x86)\eM Client
(4) Download and install the latest version from the Release History.
(5) The latest version of eM Client should then start with all your data in place.