Is there any way of merging lots of street data in QGIS and getting one layer for exporting it to Postgresql? I know one method using mmqgis "Merge Layer" tool. It works in Ubuntu but not in Windows. When I want to open my MapInfo .TAB file in Windows it opens but this time mmgqis tools do not work. In Ubuntu it gives "*\**.TAB is not a valid or recognized data source "...

Can I solve this with some Python code or any other way?

Thanks