Every time I attempt to do a Find in Calc, both Calc and Writer crash. This is extremely annoying and severely limits the usefulness of Calc.
Could you give a try at last stable LO version 6.4.5? If necessary, you can also try https://wiki.documentfoundation.org/QA/FirstSteps
Updated to v6.4.5.2 and that fixed the problem.
Thank you for your feedback. Let's put this one to WFM then.