plugins not installed in any version of pgadmin installed

<div class="WordSection1"><p class="MsoNormal">On one machine <p class="MsoNormal">(intel i5-4310U) 64 bits<p
class="MsoNormal">ThePlugin menu is showing the folowing message :<p class="MsoNormal">«Aucun plugin installé » meaning
« Noplugin installed » <p class="MsoNormal">This is checked for <p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0level1 lfo1"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New
Roman"">       </span></span>32bits versions  1.16 1.18 1.20 <p class="MsoListParagraph"
style="text-indent:-18.0pt;mso-list:l0level1 lfo1"><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New
Roman"">       </span></span>64 bit version 1.20 installed with postgresql 9.4<p class="MsoNormal"> <p
class="MsoNormal">Igess it might be linked to visual c++ libraries installed on the machine but <p class="MsoNormal">I
haveno clue how to confirm the hyopthesis nor how to correct the problem.<p class="MsoNormal"> <p
class="MsoNormal">Thanksfor your help.<p class="MsoNormal"> <p class="MsoNormal">Benoit Rolland</div>