What should I do if the trial period of Navicat has expired?

#!/usr/bin/env python3
# -*- coding:utf-8 -*-
import osimport re# 试用时间重置的正则
ps = ( re.compile(r'\[Software\\\\PremiumSoft\\\\Data\\\\\{[^\}]*\}\\\\Info\].*?\n[^\[]*'),        
re.compile(r'\[Software\\\\Classes\\\\CLSID\\\\\{[^\}]*\}\\\\Info\].*?\n[^\[]*'))
# user.reg 的路径regfile = os.path.join(os.environ['HOME'], '.navicat64', 'user.reg')
# 正则替换with open(regfile, 'r+') as f:    
regstr = f.read()    
for p in ps:        
regstr = p.sub(lambda m: '', regstr)    
f.seek(0, 0)    
f.truncate()    
f.write(regstr)