The latest version 3.4.2 has a problem with Option button grouping on forms. If you have more than one set of grouped option buttons on a form, only one option button in all the differently grouped sets of option buttons can be selected. For those who have spreadsheets utilizing the built-in Basic macro programming code, this will make your spreadsheet unusable. This is a known bug in version 3.4.2. Too bad PortableApps does not provide earlier app versions to download. LibreOffice version 3.3.4 does not have this option button problem.