[Pharo-users] Recommended way to move a package

I have Pharo 8.0 on my MacBookAir and Pharo 9.0 on my server. I have having lost of trouble doing what I thought would be a simple process - File out a package on one and file it in on the other but I having lo=ts of trouble - to many issues to document to be honest. So, tell me, how do I do this so that my package is in the new image along with the code extensions to other classes listed as being in the package. I can get the basic package in but the extensions never appear and I have too many to import individually. Help! David