I have been using Thunderbird for many, many years now and been happy with it. However last 6 months or so, it has been constantly crashing, often several times a day. Crash reports almost never get sent as it says there is a technical error. Using a HP Spectre 360 (7 years old) with Windows 10. All windows updates have been applied, and constantly virus checked etc. No other programs giving me grief like Thunderbird which is the most important program. Before Thunderbird I used Eudora which was also great. Always regretted changing to Thunderbird. I am now over it and Thunderbird. How do I transfer all my emails, attachments etc going back 10-12 years or so to a new email program. Any suggestions regarding a better email client. Don't want to use Outlook. Have been looking at Proton Mail.