Both apps share the same data directory but each has different settings. So please do the following:

• install Locus Map 4 to the same storage as your Locus Map Pro (don't worry about any conflict)
• make a complete backup of Locus Map Pro data
• open the backup file in Locus Map 4 backup manager
• restore all items except the points/tracks/routes database (no need to do it):
  
• restart Locus Map 4
• (uninstall Locus Map Pro if you don't need it any longer)