Datasource path and worksheet gets empty after close

Hi,

I got a problem since I upgraded to Ready API 1.4.0.

1. Create a new Datasource

2. Choose type Excel

3. Browse a file on my local hard drive

4. Close the tab with the datasource

5. Open the datasource again, now the path to the file is empty

Same thing happens if I open an old datasource in my project. After close, and reopening - the path to file and worksheet is gone and I it keeps getting empty every time I close the tab with the datasource.