I've never tried as yet, but I'd imagine that it's fairly easy to slice through the glue with a scalpel or some such fine blade - hobby knife perhaps. But the basic idea is that the supercaps ought to have a life of at least 10 years say, provided they're not subject to mechanical disturbance, vibration etc (hence the glue) and were carefully handled during assembly, which is apparently the prime reason for the supercap problem in early VP2 stations - I'd guess that the machines used for board stuffing, while fine for normal capacitors were just a little too rough on the more delicate supercaps. But since the production process has been progressively tweaked, the supercap problem has become pretty rare.