The .htaccess file is a web server configuration file. It lives on your server machine and can be used for quite a few different things, including your store URLs. Miva Merchant occasionally needs to write to your .htaccess file. Historically, however, people would also manually edit the .htaccess file, and that's where the trouble started. Sometimes, the Miva Merchant software would over-write a change that you had manually made to the file. Sometimes people would edit or delete changes that the Miva Merchant software had made, and in either case, your store wouldn't behave as expected.
To make life a little easier, Miva Merchant added the .htaccess tab in Version 9.0004. This tab is basically an interface to your store's .htaccess file for managing URLs. One of the changes in Version 9.0004 is that Miva Merchant now writes URL information to clearly labeled "blocks" in the .htaccess file.
You can continue to manually edit your .htaccess file, as long as you don't make changes within the Miva Merchant blocks.
If you set your Link Source to:
Please also see:
In most cases you use the Update and Delete buttons when you change your link source. See Changing Your Link Source.
In Version 9.0004, Miva Merchant added a kind of backup and restore function for your .htaccess file. Every time you click the Update or Delete buttons in the .htaccess tab, Miva Merchant:
To Restore a Previous Copy of Your .htaccess File