Upgrade lead to random ports

I was running flashfxp trial for awhile before I purchased....speeds were full gigbit lan back and forth to my local server running gene6 ftp. Upgraded with paid version now speeds at a crawl at 10mbit lan speeds. SMB tranfers are still full speed back and forth. One difference I noticed was in flash prior to upgrade it always showed my actual port of 55755 when opening data connection in logs at bottom right. Now it shows random ports ie..... [16:31:33] [L] Opening data connection IP: 192.168.0.200 PORT: 62584
port number different every transfer.
What gives? Windows firewall is disabled on both pc with flashfxp and server pc. Both on same subnet local lan.