I have been using a trial version of ESS .621 for about 2 weeks and would like to upgrade to .642. Can I download and install over .621 or do I need to do a complete uninstall first then install .642?
you can install v642 on top of v621 but i alway's uninstall old version and then install letest(export you setting and after new version install import them) do it as you like both work's
Anyways, using a trial version is not allowed for more than 30 days, then you have to either uninstall it or purchase a full version.
Jad spoke of two weeks, so another two weeks of the new version. But Marcos, what happens to him when he lets it on his machine: does the Slovenian Eset police enters his home?
Since version 3.0.642 contains only fixes for certain problems, you don't need to install it in place of version 3.0.621 unless you have experienced some problems with it.