Lachi wrote:
You can make a double installation if you want to be able to play two different databases.

This is how to do it:
1. Uninstall the game
2. Install the game and write down the name of the folder where you installed it into
3. Install the patch
4. Make a copy of the game folder for every DB you want to play
5. Install each DB into one of the copied folder

To play one of the DBs:
1. Rename the original folder (where you installed your game into) to "PCM Original"
2. Rename the copied folder of the DB to the name you wrote down in step 2

To switch between the DB:
1. Rename the game folder to "PCM [Name of DB]"
2. Rename the copied folder of the DB to the name you wrote down in step 2