A family of Microsoft relational database management systems designed for ease of use.
I have one who refuses and I get a call every day, sometimes more than one call a day about the back-end data file crashing.
If it was me I'd be pointing them to this thread as evidence that the problem was created my MS and that now, 12 months later MS has failed to provide any viable fix other than the workaround, and that if the client refuses to use the workaround you will be charging them for your time when responding to calls relating to the issue.
You can lead a horse to water............