MultitrackStudio 3.x and 4.x feature a different way of sending emails to Support with a report attached to them.

The best way to contact Support is via the support link in the Studio menu's Contact window. It'll let you send an email message using your default email program. A report will be attached to your email message which helps us helping you.

Contact window with Support link

The Copy button copies the report to the Windows clipboard. You can use this to paste the report in a webmail program, or to paste it in Notepad and move it to your internet computer.

If you can't use the support link you can mail to support@multitrackstudio.com.