[Problem with themes using BIgBox on a pendrive]

Hi, i recently try to put my BigBox on a pendrive and every time i change a theme (only default works) i get 3 or 4 windows with a problem report

I try to make a clean install like you can see in the image but the problem continue.

I install the themes from the theme manager of BigBox.

Note: Bigbox works without problems when is in my disk but only in the pendrive i get this problem.

[Images too big]

Sorry for my level of english but i have a problem that´s bothering me since some time and i dont find any way to solve.

When i play a game from launchbox or bigbox i get the start image too big and when it close it happens too

(this is the image i get when i close a game its the same size wehn i play one)

well i assume it was normal but recently i donwload pause menu theme and when i put pause in the game i get an image too big to see it comfortly (In this moment is when i realize than my problem wasnt normal because i see image of how it should looks)

there is some way to fix this?

Thanks for the help i hope it can fix it