How about this:

To Save:

Settings.Default.blEnabled = string.Join(",", blenabled.Select(x=>x?"1":"0"));

To Load:

if(!string.IsNullOrWhitespace(Settings.Default.blEnabled))
  blenabled = Settings.Default.blEnabled
    .Split(',')
    .Select(x=>Convert.ToBoolean(int.Parse(x)))
    .ToList();

Is there some requirement that you save them as integers? It could be further simplified by just using bool.ToString() and bool.Parse()...

How about this:

To Save:

Settings.Default.blEnabled = string.Join(",", blenabled.Select(x=>x?"1":"0"));

To Load:

if(!string.IsNullOrWhitespace(Settings.Default.blEnabled))
  blenabled = Settings.Default.blEnabled
    .Split(',')
    .Select(x=>Convert.ToBoolean(int.Parse(x)))
    .ToList();

Is there some requirement that you save them as integers? It could be further simplified by just using bool.ToString() and bool.Parse()...

How about this:

To Save:

var values = blenabled
  .Select(x=>x?"1":"0")
  .ToArray();
Settings.Default.blEnabled = string.Join(values, ",");

To Load:

if(!string.IsNullOrWhitespace(Settings.Default.blEnabled))
  blenabled = Settings.Default.blEnabled
    .Split(',')
    .Select(x=>Convert.ToBoolean(int.Parse(x)))
    .ToList();

Is there some requirement that you save them as integers? It could be further simplified by just using bool.ToString() and bool.Parse()...

How about this:

To Save:

Settings.Default.blEnabled = string.Join(",", blenabled.Select(x=>x?"1":"0"));

To Load:

if(!string.IsNullOrWhitespace(Settings.Default.blEnabled))
  blenabled = Settings.Default.blEnabled
    .Split(',')
    .Select(x=>Convert.ToBoolean(int.Parse(x)))
    .ToList();

Is there some requirement that you save them as integers? It could be further simplified by just using bool.ToString() and bool.Parse()...