Yes. Most of the Software we distribute comes with full source code, and you are entitled to modify it as you wish. However, please be aware of some consequences of doing it:

• We don’t provide any free support to modified Software, under any circumstances. That applies regardless of the Licence under which the Software was obtained. If you apply the modifications in the period covered by free Support, such cover will become void.
• We don’t guarantee that any of the modifications will be maintained when Software will be updated. It will be up to you to make sure that updating the software won’t break your modifications.
• You are not allowed to distribute any of the code of the original Software, in any form or shape, either alone or as part of a package, for free of after payment, without written permission from Us. This applies to all Software obtained from Us, unless it is provided under a Licence that explicitly grants you redistribution rights.