Self signed Extension not visible in Indesign CC although installed in Extension manager CC

I have a HTML Extensions which I self signed (by creating a self signed certificate) using ZxpSignCmd. I exported my Extension in ZXP format

and it got installed under Indesign CC 32 bit.

But when i open indesign and check for my extension, I cannot find it under Extensions Tab.

Pleas note that when I copy the ZXP contents in the "C:\Users\CS47\AppData\Roaming\Adobe\CEPServiceManager4\extensions", It appear in Indesign CC.

But i need to install it using Extension manager.

I can't find another thread with a similar issue so please let me know how to deal with this.