fix json progressbar value (now reaches 100%), #BUILD beta

#BUILD beta

fix json progress output for all files, #BUILD beta

disable debug log, #BUILD beta

fix maxthreads limit, GUI: fix crash if no import/export format selec…

…ted, remove % from json percentage value, remove default export format (need to select or assign it with args), #BUILD beta

#BUILD test4

#BUILD test3

#BUILD test

#BUILD test

#BUILD beta