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    <div class="moz-cite-prefix">Yes, you can reinstall an earlier
      version of Chimera.  Multiple versions can be on your computer at
      the same time.  But first, try running Chimera's Tools / Utilities
      / Browser Configuration tool to reassociate .pdb files with
      chimera.  And as you know, you can always use Chimera's Open
      dialog.<br>
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          HTH,<br>
      <br>
          Greg<br>
      <br>
      On 06/02/2014 11:17 PM, Robin Parmar wrote:<br>
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                          <div>Hello,<br>
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                          Warm Greetings!<br>
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                        Thank you for Allowing me to use Chimera through
                        academic license.<br>
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                      Yesterday(June 2nd) I was prompted to update
                      Chimera to 1.9 version.<br>
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                    I accepted and installed it successfully on my
                    system (windows7pro). Before that I had removed
                    Chimera 1.8.8.<br>
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                  The problem I face is, I can not open certain
                  .pdb/.pdbqt fies saved in my comuter. such files even
                  do not exhibit chimera logo which earlier version did.
                  Even with "choose default program"  system can not
                  open these files insted other program (like spdbv)
                  open them.<br>
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                I have not made any change in my system after installing
                new version.<br>
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               Can I reinstall earlier vrsion(1.8)? <br>
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            Kindly suggest me what best I should do to avail service
            (Academic Research) of chimera again.<br>
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           Regards.  <br>
          <br>
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        -Robin </div>
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