Almanac files can be found at U.S. Coast Guard Navigation Center
To download these files, click on the link and choose the "Save" option. When the files are downloaded, they are saved as "current.alm.txt"
Please note: The txt extension must be there for Planning to recognize the files appropriately.
Alternatively files can be found at Celestrak website. Note: right click at appropirate file and "save link as" into your PC.