Hmmmm ... ran out of time while editing ... addition:
If you have xmllint installed (on a Mac think it's part of xpath install - Google for that or just go to command line and type: whereis xmllint)there is a way to acquire the text of some resources that might be extracted via ditto. (CentOS and Ubuntu, BTW, does have xmllint)
In the extracted Activities folder (if there is one), folders like the following might exist:
assign_48 assign_68 page_275 page_58 page_86 resource_50 resource_57
assign_59 assign_80 page_276 page_69 page_91 resource_51 url_71
assign_60 assign_82 page_277 page_72 page_92 resource_52 url_74
assign_61 attforblock_37 page_278 page_76 page_93 resource_53 url_75
assign_62 choice_88 page_44 page_77 quiz_40 resource_54 url_89
assign_63 label_64 page_45 page_79 quiz_90 resource_55
assign_67 label_65 page_47 page_81 resource_49 resource_56
In each one will see an .xml file larger than the others.
Example: page_275 has a 'page.xml' file larger than the other .xml files
-rw------- 1 ktask staff 1951 Apr 11 12:42 page.xml
xmllint --xpath //content page.xml > content.txt
extracts the <content> tag and the text up to the closing </content> tag into a content.txt file which means fewer search and replace actions to recover text.
'spirit of sharing'. Ken