How to keep target strings that are already present in *.PO file?

Question

Hello, 
 when processing a *.PO source file, it seems that the target strings, which this file already includes, have disappeared (as if the goal is to write new strings). Nevertheless, I don't want to translate anything, since the translation has already been done and I'm only supposed to review it and to add some terms into a termbase. Do you have any idea how to keep the original translation unchanged? I'm using Passolo 2016 in Demo version if that makes any difference. 
 
 Thank you. 
 
 Best Regards, 
 
 Jon&aacute;&scaron;.

Achim Herrmann · Accepted Answer

Have you added a target language to the project? If yes, select the translation list in the project view then call the alignment function.

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How to keep target strings that are already present in *.PO file?