Update OriginalFilePath after project move

Dear community,

I have a custom file type. Sometimes it happens that the project is moved which leads to an issue in my Writer, because the value of

_conversionProperties.OriginalFilePath

is not correct anymore.

How can I get the current project file path from inside my Writer to concatenate an updated source file path string in such cases (given project path + source language + source file name)?

Best wishes,
Simon