Why rekordbox free often stucks

hi i use the newest Version of rekordbox on my win 10 PC. My PC is more than fast enough for the Software, CPU and also the RAM. 

Nevertheless, the Software often hangs up. In the most cases it takes a few seconds to 1-2 minutes and the Programm works normally again. But why? Is it why I use (only) the free Version or is in the Abo-Versions the same Problem?

Maybe someone knows more

Thanks