Here's a trick I learned on the internet -- freeze a clix figure in the ref overnight. The cold makes the glue used to bond the figure to the base brittle. Remove the figure from the base by using a thin screwdriver to gently break off the glue. I've had problems with figure with thin ankles but I've managed to save them by removing the broken off feet from the base and regluing them back to the figure.
Here are some Mage Knight Frost Minions I took off from their bases and glued on some gaming chips.