> If you’re considering FileZilla Pro, understand exactly what you are walking into: You can pay for a perpetual license, and later be denied any way to reinstall the product you legally own.
No. You are not denied any way to reinstall the product you legally own. It's on you to maintain backups of your installers. If you have that backup, you may install it and run it legally.
> Their excuse: “For security reasons we do not provide older versions.”
I can understand that logic. If an out-of-date version is found to have a vulnerability, then if they provide that version but don't update it, they are exposing themselves to lawsuits. Whether or not the lawsuit makes sense is another matter, but I can imagine the company's lawyers putting the kibosh on providing an archive of outdated installers.
No. You are not denied any way to reinstall the product you legally own. It's on you to maintain backups of your installers. If you have that backup, you may install it and run it legally.
> Their excuse: “For security reasons we do not provide older versions.”
I can understand that logic. If an out-of-date version is found to have a vulnerability, then if they provide that version but don't update it, they are exposing themselves to lawsuits. Whether or not the lawsuit makes sense is another matter, but I can imagine the company's lawyers putting the kibosh on providing an archive of outdated installers.