Installing new modules/libraries

Hello,
I have been using Drupal for quite a while now and have been quite satisfied overall. By the way, I use DR 7.54 at this time. However, once in a while I encounter the following issue:
When following the normal procedure for installing a new version of a module (by putting it into …/sites/all/modules) I sometimes find that looking at the respective report (i.e. available updates), it still displays the old version. This just happened again with the Flexslider module and library, as well as the newest token module. I have cleared the cache, but this does not help. What am I missing?
Regards
H. Stoellinger


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