Sorry to read of your lost save games, davenwolf.
The subject of CCleaner wiping Machinarium saved games has previously been addressed on this forum in great detail.
Use
Search and type in "CCleaner" to see the full extent.
Meanwhile, for now, just:
1. Open ccleaner.
2. Options
3. "Exclude"
4. Add Folder
5. Search the save path, eg C:\Users{USERNAME}\AppData\Roaming\Macromedia\Flash Player\#SharedObjects\{RANDOMWORD}\localhost\Program Files\Machinarium\machinarium.exe
check if the box is in | *.* |
6. Accept
5. Ready now can use ccleaner and do not erase your saved game.
(thanks to jm2k7 for
this info)