Unable to import hand history to pokeroffice

[Adreno]

When I try to import my hand history from Betsson (500Mb .db file) to Pokeroffice, it just says "please wait while importing hand history", and after 20 minutes it stops using CPU and just stays like that apparantly doing nothing. I'm thinking maybe some part of the file is causing pokeroffice to stop importing hands. Maybe there is a way to split the .db file into multiple files and try importing them one by one, or some other way to import hands into pokeroffice? The hand histories show fine on Betsson's own stat viewer.