I don't store my database on a cloud service because I want it to be available offline. The backup plug-ins are all simple and should work. Exactly what problems are you having? cheers, Paul
Copy the database manually to whatever location you want is simple. Save it in email is also an option. Create a new email message, attach the database and save the draft. Whatever you do, make sure you regularly make backup copies. cheers, Paul
Find > Large Entries. Click on the largest entry to be taken to it. Edit the entry and click the History tab. Delete old entries with large attachments. Save. Now you can keep old histories. cheers, Paul
You can't write a password changer for websites because they all differ in how they do it, and then they change the method without notice. Nothing to do with security. cheers, Paul
Clicking the "Convert to CSV" link takes you to a list of converters. You then decide which converter you want to use. KeePass already has many importers. What is the file you want to import. cheers, Paul
What is the exact error? If it's "HMAC mismatch" that suggests you are using the wrong password. A Linux VM may have a different keyboard. Try showing the password to be sure it's correct. cheers, Paul
How can you use the same password more than once unless you are entering it manually? Let KeePass create the password and you will never have two the same. You can check if there are duplicates. Find > Duplicate passwords. cheers, Paul
Auto-Type is still working for me on various machines. We need to know exactly what doesn't work and how you make it not work. cheers, Paul