Can I use TermExcelerator for Translation from Japanese to English?

I sometimes use TermExcelerator when my termbase takes much time to be recognized by Trados Studio.
When translation pair is English to Japanese, TermExcelerator works well.

Today I tried to use this app for opposite direction, that is Japanese to English.
However excel-formed sheet was not recognized and an error message was displayed.

The error message is as follows:

Unicode 文字のマッピングがターゲットのマルチバイト コード ページにありません。 (Exception from HRESULT: 0x80070459)

 

I am afraid this app cannot be used when source language include double byte character...

If there is a solution, please teach me.

 

Thank you for your attention.