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    <div class="moz-cite-prefix">Yes, you can reinstall an earlier
      version of Chimera.&nbsp; Multiple versions can be on your computer at
      the same time.&nbsp; But first, try running Chimera's Tools / Utilities
      / Browser Configuration tool to reassociate .pdb files with
      chimera.&nbsp; And as you know, you can always use Chimera's Open
      dialog.<br>
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      &nbsp;&nbsp;&nbsp; HTH,<br>
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      &nbsp;&nbsp;&nbsp; Greg<br>
      <br>
      On 06/02/2014 11:17 PM, Robin Parmar wrote:<br>
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cite="mid:CAHxv6UYjYWQrJBNG6iZyqoXeZVprDns1X6_mBBdFWfcFJgz1Bw@mail.gmail.com"
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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"&nbsp; 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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              &nbsp;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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          &nbsp;Regards.&nbsp; <br>
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        -Robin </div>
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