When it comes to Switch from IncrediMail to Thunderbird there is only one tool that is PCVARE IncrediMail Converter software. Thos program converts IMM files from IncrediMail database to MBOX profile. With all the email components of the IMM files whether it is metadata details, attachments or formatting, this program will Switch from IncrediMail to Thunderbird with all the information. Even a technically less inclined user can also easily Switch from IncrediMail to Thunderbird with IncrediMail Converter. For more information try the demo version of IncrediMail Converter for free, this version will convert only limited IMM files to Thunderbird. For full conversion all you need is the license version of the software which cost only $99.