Even with 64-bit Windows, we use 32-bit PostgreSQL, so it is sufficient to copy the data folder winstrom-data (C:\winstrom-data)
Before copying, you need to shut down Flexi (stop PostgreSQL).
After that, you can install Flexi, which will take over the original data.
In case of an error during installation:
Try saving the winstrom-data folder to a location with more permissive access rights, such as the Documents folder. Then, during installation, select the path to that location.