manually add file_format_version 1 to all map headers, defined as 'fixdialogue + faces renamed'
load/save cycle to update maps to modern format
load/save cycle to update maps to moden format
This form allows you to request diffs between any two revisions of this file. For each of the two "sides" of the diff, select a symbolic revision name using the selection box, or choose 'Use Text Field' and enter a numeric revision.