Google Play store clear cache

Hi there,

I have a COOD-E box version 1.2.5 and installed Kodi on it.
The system summary says: Android 4.4.2 API level 19. Kodi 15.2 (Isengard).
Kodi works fine it is all about the play store app.

Programs > Android Apps > Google Play store

If I open Google Play store it shows a blank screen or white screen.
The solution to this is already known: Just clear the Google cache. The are many post on forums and video’s that show how to do this. But they are all different and I can not fins a “App management” part where I can clear the cache or modify App properties.
The obvious thing to do is “Google Play Store” > context menu. But this only shows “go tot root” and “Add to favorites”.

I am anxious to upgrade Kodi because many post say that this would brick my COOD-E device.
So I’m looking for a way to access and clear the cache of the Play store app without risking bricking my device.

Any help would be appreciated.

And yes, I’m a newbie.

Bye