I am trying tp import a map (.umap) and it will not load up. I am pulling it from my flash drive. What do I need to do?

I am trying tp import a map (.umap) and using the IMPORT icon and UR4 does not even see the map in my flash drive. Then, I open up my file manager and on my flash drive I see the map.
Then, I drag and drop the map and in and it gives me an error.
Also, when I double click on my map to attempt to open it up it asks me with what program shall I open it up.
So my questions are as follows:

  1. How do I get my map from my flash drive to UR4?
  2. What program should I use when double clicking to open my map?
    Thank you,
    Christopher Yarusso

Have you tried to Migrate it?