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There are 2 versions of Thunderbird on my pc. v 31.1.0 date 20.07.2016 and v 45.2.0 date 11.07.2016. Can I delete one of them? The same problem with Firefox .

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Every time I open Yhunderbird pc say there are 2 versions. I checked my configuration file and indead there are 2 thunderbird and 2 Firefox programs on my pc. Can I delete one of them?????

Every time I open Yhunderbird pc say there are 2 versions. I checked my configuration file and indead there are 2 thunderbird and 2 Firefox programs on my pc. Can I delete one of them?????

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Windows has a tendency to lie about this. I would bet you only have the latest version installed and if you believe Windows and try to remove the older version your working version will be removed.