MS Outlook Upgrade - Version 2.0 MS Outlook Upgrade tool to upgrade Outlook data file from ANSI to Unicode PST file format. With the using of PST file converter you can convert ANSI PST to Unicode PST and Unicode PST to ANSI PST because software can perform both degradation and upgradation tasks. Users can easily export PST files and increase Outlook PST files without deleting any mail from Outlook PST file but only with the help of Outlook PST Conversion tool. Try free demo version of the tool and evaluate the efficiency of the tool but trial version can convert only first 3 folders from Outlook PST files. To convert all folders of PST files to ANSI or Unicode PST format, you need to purchase fully fledged version of PST Upgrade tool at very affordable price that is 49 USD.