Updates regularly appear. After a period of time it is necessary to pay to license them, but there is no 'detonation' date, nor feature disabling for previously licensed software.
If the program became corrupted you should have been able to reinstall it or, if need be, contact NCH to make it right. The install file may be stored in this path...
"C:\Program Files (x86)\NCH Software\VideoPad"
What version were you using?